Pharmacology I: Final Quiz

Descrição

Final Pharmacology I Quiz from Veterinary Pharmacology I taught by Dr. Werners, and Lady Dr. Kumar
MRaythe
Quiz por MRaythe, atualizado more than 1 year ago
MRaythe
Criado por MRaythe mais de 9 anos atrás
251
4

Resumo de Recurso

Questão 1

Questão
1. MUSCLE RELAXANTS: True or false: guaifenesin selectively depresses transmission at internuncial neurons in the spinal cord, brainstem, and subcortical areas
Responda
  • True
  • False

Questão 2

Questão
Which is not an effect of guaifenesin?
Responda
  • Depresses CNS giving sedation and muscle relaxation
  • Decrease BP which then returns to normal
  • High doses can cause respiratory depression
  • Analgesia

Questão 3

Questão
Which of the following is false regarding guaifenesin?
Responda
  • It has hepatic metabolism to a glucuronide and is excreted in urine
  • You should avoid using it with physostigmine
  • It lasts longer in female ponies than males
  • It can cause hemolysis in cows

Questão 4

Questão
Which muscle relaxant requires artificial ventilation with use?
Responda
  • Guaifenesin
  • Neuromuscular blockers
  • That’s it…

Questão 5

Questão
Which type of neuromuscular block are agonists at the ACh receptor?
Responda
  • Depolarizing
  • Non-depolarizing

Questão 6

Questão
Which non-depolarizing neuromuscular blockers are incorrectly matched with their duration
Responda
  • Mivacurium—short
  • Tubocurarine, doxacurium, pancuronium, pipecuronium—long
  • Atracurium, rocurium, vecuronium—intermediate
  • All of the above are correct!

Questão 7

Questão
Which of the following causes initial muscle fasciculation?
Responda
  • Depolarizing neuromuscular blockers
  • Non-depolarizing neuromuscular blockers

Questão 8

Questão
Which of the following are competitive antagonists at the ACh nicotinic receptor?
Responda
  • Depolarizing neuromuscular blockers
  • Non-depolarizing neuromuscular blockers

Questão 9

Questão
Which of the following is not a depolarizing neuromuscular blocker?
Responda
  • Decamethonium
  • Suxamethonium
  • Mivacurium

Questão 10

Questão
On which of the following can you use anticholinesterase drugs to remove the effect?
Responda
  • Depolarizing neuromuscular blockers
  • Non-depolarizing neuromuscular blockers

Questão 11

Questão
True or false: the amount of fasciculation correlates with the post-operative muscle pain
Responda
  • True
  • False

Questão 12

Questão
Which of the following is not an effect of suxamethonium?
Responda
  • Decreased intraocular pressure
  • Potassium release
  • Bradycardia
  • Prolonged paralysis
  • Sometimes malignant hyperthermia

Questão 13

Questão
Which of the following does not influence the effect of muscle relaxants?
Responda
  • Other neuromuscular agents
  • Cholinesterase inhibitors
  • Aminoglycoside antibiotics
  • None of the above

Questão 14

Questão
Which of the following is the most sensitive to neuromuscular blockers?
Responda
  • Dogs
  • Cats
  • Cattle
  • Sheep

Questão 15

Questão
In which species do you most commonly use neuromuscular blockers?
Responda
  • Pigs and cats
  • Dogs and horses
  • Cattle and sheep
  • Horses and cats

Questão 16

Questão
HEMOSTATIC AND ANTICOAGULANTS: Which of the following hemostatics can cause extensive intravascular clotting when administered intravenously?
Responda
  • Fibrinogen
  • Thromboplastin
  • Thrombin
  • Fibrin

Questão 17

Questão
What’s a good characteristic of a topical hemostatic?
Responda
  • Minimal tissue reactivity
  • Easy to sterilize and handle
  • Consist of either thrombin or collagen
  • All of the above

Questão 18

Questão
Which is used in measurement of prothrombin time during anticoagulant therapy?
Responda
  • Fibrinogen
  • Thromboplastin
  • Thrombin
  • Fibrin

Questão 19

Questão
Which topical hemostatic converts endogenous fibrinogen to fibrin for clot formation?
Responda
  • Fibrinogen
  • Thromboplastin
  • Thrombin
  • Fibrin

Questão 20

Questão
Which topical hemostatic can be used for bleeding from denuded mucous membranes, as an adhesive in skin grafts, and for massive blood loss?
Responda
  • Fibrinogen
  • Thromboplastin
  • Thrombin
  • Fibrin

Questão 21

Questão
Which topical hemostatic is used for bleeding from parenchymatous tissue, cancellous bone, dental sockets, laryngeal/nasal surgery, reconstructive surgery, and as an adhesive agent for fixation of skin grafts?
Responda
  • Fibrinogen
  • Thromboplastin
  • Thrombin
  • Fibrin

Questão 22

Questão
Is fibrin foam soluble?
Responda
  • Yes
  • No

Questão 23

Questão
What do you use absorbable gelatin sponge/gelfoam for?
Responda
  • Oozing from the surface area
  • Massive blood loss
  • Capillary/venous bleeding
  • Surgery of the liver and spleen

Questão 24

Questão
Which of the following should only be used temporarily because otherwise you’d get fractures and cysts?
Responda
  • Oxidized cellulose
  • Gelatin sponge
  • Microcrystalline collagen
  • Styptics

Questão 25

Questão
Which are clinical uses of microcrystalline collagen?
Responda
  • Clotting factor deficiencies
  • Thrombocytopenia
  • Surgery of the liver and spleen
  • Clotting factor deficiencies and Thrombocytopenia
  • Clotting factor deficiencies and Surgery of the liver and spleen
  • Thrombocytopenia and Surgery of the liver and spleen

Questão 26

Questão
Which topical hemostatic produces immediate vasoconstriction and controls bleeding from small vessels?
Responda
  • Oxidized cellulose
  • Gelatin sponge
  • Microcrystalline collagen
  • Epinephrine

Questão 27

Questão
What’s the problem with high concentrations of styptics?
Responda
  • Cyst formation
  • Fractures
  • Sloughing of tissues and hemorrhage
  • Reduced effectiveness

Questão 28

Questão
Which systemic hemostatic is used for emergency treatment of acute hemorrhagic syndromes with deficiency of clotting factors/platelets?
Responda
  • Vitamin K
  • Blood
  • Desmopressin acetate
  • Protamine sulfate

Questão 29

Questão
Which systemic hemostatic releases stored vWf from endothelial cell and macrophages and controls capillary bleeding from wounds?
Responda
  • Vitamin K
  • Blood
  • Desmopressin acetate
  • Protamine sulfate

Questão 30

Questão
Which systemic hemostatic is made from fish sperm?
Responda
  • Vitamin K
  • Blood
  • Desmopressin acetate
  • Protamine sulfate

Questão 31

Questão
Which systemic hemostatic is used to antagonize heparin-induced hemorrhagic action (since it’s basic and combines with the acidic heparin to prevent it from acting as an anticoagulant)?
Responda
  • Vitamin K
  • Blood
  • Desmopressin acetate
  • Protamine sulfate

Questão 32

Questão
Which systemic hemostatic aids in the production of clotting factors II, VII, IX, and X and should not be given IM or IV?
Responda
  • Vitamin K
  • Blood
  • Desmopressin acetate
  • Protamine sulfate

Questão 33

Questão
Repeated administration of which drug reduces its effectiveness?
Responda
  • Vitamin K
  • Blood
  • Desmopressin acetate
  • Protamine sulfate

Questão 34

Questão
Which anticoagulant should you not use for laboratory diagnostic purposes?
Responda
  • Sodium oxalate
  • Acid citrate dextrose
  • Sodium citrate
  • Edetate disodium

Questão 35

Questão
Which is not part of the mechanism of heparin?
Responda
  • Binds reversibly to antithrombin III to produce conformational changes to it, thereby inhibiting thrombin and activated factor Xa
  • Binds to endothelial walls, imparts negative charge, inhibits platelet adhesion and aggregation
  • Inhibits hepatic synthesis of prothrombin and factors II, VII, IX, and X
  • Increases plasminogen activator and tissue factor inhibitor

Questão 36

Questão
Which of these describes the action of heparin?
Responda
  • Antithrombotic
  • Anticoagulatory
  • Neither
  • Both

Questão 37

Questão
Which of the following statements is false regarding heparin?
Responda
  • It’s used to prevent venous thrombosis and pulmonary embolism, and to treat thromboemboli, as well as to treat DIC and to decrease risk factors in heartworm adulticide treatment
  • It prevents serosal post-operative adhesions
  • It’s metabolized by the liver and reticulo endothelial system
  • Its antidotes are protamine and fresh blood

Questão 38

Questão
Which of the following is false regarding vitamin K antagonists?
Responda
  • It is stored in adipose tissue
  • Undergoes metabolism in the liver and is excreted in urine
  • It’s used for prophylaxis and treatment of venous thrombosis
  • Its side effect is hemorrhage

Questão 39

Questão
Which of the following is false regarding fibrinolytic agents?
Responda
  • Streptokinase can cause systemic fibrinolysis
  • Tissue plasminogen activator is used for lysis of aortic thromboemboli in cats
  • Fibrinolysin is an activator of plasminogen
  • Urokinase is isolated from pee and prevents serosal post-operative adhesions in dogs

Questão 40

Questão
Which of the following irreversibly binds COX in order to inhibit thromboxane A2 and prostaglandins?
Responda
  • Aspirin
  • Clopidogrel
  • Dipyrimadole
  • Ticlopridine

Questão 41

Questão
Which of the following inhibits phosphodiesterase, increasing cAMP levels in platelets, which inhibits aggregation?
Responda
  • Aspirin
  • Clopidogrel
  • Dipyrimadole
  • Ticlopidine

Questão 42

Questão
Which of the following is a P2Y12 receptor inhibitor, resulting in more cAMP and less aggregation of platelets?
Responda
  • Aspirin
  • Dipyrimadole
  • Ticlopidine

Questão 43

Questão
ANTICONVULSANTS: True or false: seizures are associated with episodic high frequency discharge of impulses by a group of neurons
Responda
  • True
  • False

Questão 44

Questão
Which of the following neurotransmitters is not involved in epileptogenesis?
Responda
  • Glutamate
  • Aspartate
  • Glycine
  • GABA

Questão 45

Questão
Which of the following is a problem associated with seizures?
Responda
  • Brain edema
  • Hyperthermia
  • Aspiration pneumonia
  • Disseminated intravascular coagulation
  • Permanent brain injury
  • All of the above

Questão 46

Questão
Which is not a drug used in emergency treatment of seizures that stimulates GABA?
Responda
  • Phenytoin
  • Barbiturates
  • Benzodiazepines
  • Valproate

Questão 47

Questão
Which of the following drugs is mismatched with its mechanism of action?
Responda
  • Carbamazepine—inhibition of Na channels
  • Zonisamide—inhibition of Ca channels
  • Propofol—inhibition of Ca channels
  • Phenytoin—inhibition of Na channels

Questão 48

Questão
Which of the following drugs is a GABA agonist?
Responda
  • Zonisamide
  • Carbemazepine
  • Lamotrigrine
  • Etomidate

Questão 49

Questão
True or false: benzodiazepines decrease frequency of opening of GABA receptors.
Responda
  • True
  • False

Questão 50

Questão
Which route should you not use for lorazepam or midazolam?
Responda
  • IV
  • IM
  • Intranasal
  • Intrarectal

Questão 51

Questão
Which benzodiazepine inhibits T-type calcium channels?
Responda
  • Diazepam
  • Clonazepam
  • Midazolam
  • Lorazepam

Questão 52

Questão
What is not a side effect of barbiturates?
Responda
  • Hepatotoxicity
  • Autoinduction of CYP450
  • Sedation
  • Anorexia

Questão 53

Questão
True or false: barbiturates enhance GABA A by increasing the frequency of opening of the chloride channel.
Responda
  • True
  • False

Questão 54

Questão
Which of the following drugs works by competing with chloride, hyperpolarizing the neuronal membranes?
Responda
  • Gabapentin
  • Midazolam
  • Potassium bromide
  • Phenobarbital

Questão 55

Questão
Which of the following can potassium bromide be used for?
Responda
  • Only emergencies
  • Only add on
  • Both
  • Neither

Questão 56

Questão
Which is not a mechanism of action of felbamate?
Responda
  • Blocking NMDA-mediated neuronal excitation
  • Potentiation of GABA-mediated neuronal inhibition
  • Inhibition of voltage sensitive neuronal Cl channels
  • Protects neurons from hypoxic or ischemic damage

Questão 57

Questão
True or false: felbamate is well absorbed from oral administration and has a wide safety margin
Responda
  • True
  • False

Questão 58

Questão
Which of the following drugs has absorption depending on an L-amino acid carrier, making the process saturable?
Responda
  • Levetiracetam
  • Gabapentin
  • Felbamate
  • Phenobarbital

Questão 59

Questão
True or false: pregabalin has a long half life
Responda
  • True
  • False

Questão 60

Questão
Which of the following drugs works by binding to SV2A?
Responda
  • Zonisamide
  • Gabapentin
  • Felbamate
  • Levetiracetam

Questão 61

Questão
Which of the following drugs is partially excreted unchanged and partly glucuronidated?
Responda
  • Zonisamide
  • Gabapentin
  • Felbamate
  • Levetiracetam

Questão 62

Questão
Which of the following drugs weakly inhibits GABA transaminase and has some effect on sodium and T-type calcium channels?
Responda
  • Phenytoin
  • Valproate
  • Vigabatrin
  • Carbamazepine

Questão 63

Questão
Which of the following drugs is metabolized by mixed function oxidases and is well absorbed orally?
Responda
  • Phenytoin
  • Valproate
  • Vigabatrin
  • Carbamazepine

Questão 64

Questão
Which of the following drugs inhibits GABA transaminase by forming an irreversible covalent bond, resulting in increased GABA?
Responda
  • Phenytoin
  • Valproate
  • Vigabatrin
  • Carbamazepine

Questão 65

Questão
Which of the following is a tricyclic antidepressant with hepatic metabolism that is a strong inducer of hepatic enzymes?
Responda
  • Phenytoin
  • Valproate
  • Vigabatrin
  • Carbamazepine

Questão 66

Questão
BEHAVIOR MODIFIERS: Which of the following is not an indication of psychotropic drugs in vetmed?
Responda
  • Sedation and major tranquillizers
  • Behavioral disorders
  • Central analgesia
  • Peripheral anesthesia
  • Epilepsy

Questão 67

Questão
Which of the following is false regarding MAOIs?
Responda
  • MAOIs inhibit the breakdown of serotonin, norepinephrine, and dopamine
  • MAO-A has only central effects
  • MAO-B has only central effects
  • MAO-B’s substrates are norepinephrine and dopamine
  • MAO-A’s substrates are serotonin, norepinephrine, and epinephrine

Questão 68

Questão
Which of the following is not associated with serotonin syndrome?
Responda
  • Hypertension
  • Hyperthermia
  • Metabolic alkalosis
  • Rhabdomyolysis

Questão 69

Questão
Which of the following is an example of an MAOI?
Responda
  • Selegiline
  • Amitriptyline
  • Clomipramine
  • Fluoxetine
  • Alprazolam

Questão 70

Questão
Which of the following is not an adverse effect of selegiline?
Responda
  • Hyperactivity
  • Stereotypic behavior
  • Phobias

Questão 71

Questão
Which of the following drugs is incorrectly matched with its indication?
Responda
  • Selegiline—dementia in dogs
  • Clomipramine—separation anxiety
  • Fluoxetine—aggression in male dogs
  • FFP—urine spraying in cats

Questão 72

Questão
7. True or false: SNRIs are metabolized via CYP450
Responda
  • True
  • False

Questão 73

Questão
What isn’t an adverse effect of SNRIs?
Responda
  • Hypertension
  • Tachycardia
  • Arrhythmia
  • Salivation
  • Constipation

Questão 74

Questão
Which of the following is true about SNRIs according to slide 11 (e.g. generally)?
Responda
  • They have antihistamine effects
  • They have anticholinergic effects
  • They’re alpha-1 antagonists
  • These are all true!

Questão 75

Questão
Which of the following is not an indication for SNRI use in dogs?
Responda
  • Excessive arousal (mild aggression)
  • Inappropriate urination
  • Compulsive disorders
  • Anxiety

Questão 76

Questão
Which SNRI has analgesic properties?
Responda
  • Amitriptyline
  • Imipramine
  • Clomipramine

Questão 77

Questão
Which SNRI has equal effects on serotonin and norepinephrine?
Responda
  • Amitriptyline
  • Imipramine
  • Clomipramine

Questão 78

Questão
Which SNRI is used for separation anxiety and canine compulsive disorders?
Responda
  • Amitriptyline
  • Imipramine
  • Clomipramine

Questão 79

Questão
Which is an indication for SSRIs in cats?
Responda
  • Separation anxiety
  • Impulse aggression
  • Compulsive behavior
  • Dominance

Questão 80

Questão
Which is not an adverse effect of fluoxetine?
Responda
  • GI effects
  • Lethargy
  • Depression
  • Polyphagia

Questão 81

Questão
True or false: the metabolites of benzodiazepines are not active.
Responda
  • True
  • False

Questão 82

Questão
True or false: in a dopaminergic synapse the enzyme beta-dopamine hydroxyls is missing
Responda
  • True
  • False

Questão 83

Questão
Neuroleptics block which of the following?
Responda
  • ACH-M receptors
  • Alpha-adenoreceptors
  • Histamine receptors
  • Serotonin receptors
  • All of the above

Questão 84

Questão
Which of the following is an incorrect example of receptor cross talk?
Responda
  • Adrenergic a2-receptor stimulation increases the release of dopamine and serotonin
  • Adrenergic B-receptor stimulation inhibits release of serotonin
  • Dopamine down-regulates serotonin auto-receptors
  • All of the above are true!

Questão 85

Questão
True or false: progestins and estrogen suppress the excitatory effects of glutamate.
Responda
  • True
  • False

Questão 86

Questão
True or false: it’s totally fine to combine MAOIs and TCAs.
Responda
  • True
  • False

Questão 87

Questão
SEDATIVES AND TRANQUILLIZERS: Which is not a therapeutic target for these?
Responda
  • GABA agonists
  • NMDA antagonists
  • D2 receptor
  • Alpha 1 receptor agonists

Questão 88

Questão
Which is not a mechanism of action of phenothiazines?
Responda
  • Block D2 receptors in the CNS
  • Block alpha adrenoceptors in the CNS
  • Block D receptors in the periphery
  • Block alpha receptors in the periphery

Questão 89

Questão
What is not an effect of phenothiazines?
Responda
  • CNS depression
  • Peripheral vasodilation
  • Good muscle relaxation
  • Analgesia

Questão 90

Questão
True or false: phenothiazines have extensive hepatic metabolism and metabolites are excreted in bile
Responda
  • True
  • False

Questão 91

Questão
Which of the following is false?
Responda
  • You should use chlorpromazine in horses
  • Some boxers have an exaggerated reaction to acepromazine
  • Acepromazine prevents occurrence of halothane induced malignant hyperthermia in pigs
  • Phenothiazines can be used to treat feline lower urinary tract disease

Questão 92

Questão
Which is false about the mechanism of action of benzodiazepines?
Responda
  • They bind to and activate the benzodiazepine binding site on the GABA-A receptor
  • They decrease the opening frequency of the Cl channel
  • They hyperpolarize the post-synaptic membrane
  • All of the above are true

Questão 93

Questão
Which GABA receptor subunit, when mutated, prevents binding of volatile and injectable agents?
Responda
  • Alpha
  • Beta

Questão 94

Questão
Which of the following is not an effect of benzodiazepines?
Responda
  • Dose dependent muscle relaxation
  • Biphasic cardiovascular response
  • Mild respiratory repression
  • Dose dependent CNS depression
  • Analgesia

Questão 95

Questão
True or false: benzodiazepines are reduced or glucuronidated and either excreted via the kidneys (diazepam) or both in the kidney and bile (lorazepam)
Responda
  • True
  • False

Questão 96

Questão
Which benzodiazepine has active metabolites?
Responda
  • Midazolam
  • Zolazepam
  • Diazepam
  • Lorazepam

Questão 97

Questão
In which patients should you not use benzodiazepines?
Responda
  • Those with fear-induced aggression
  • Those with hypersensitivity to benzodiazepines
  • Those with hepatic dysfunction
  • All of the above

Questão 98

Questão
True or false: flumazenil is a benzodiazepine antagonist that has a high affinity for the BZ-binding sites.
Responda
  • True
  • False

Questão 99

Questão
Which of the following is false regarding a2 agonists?
Responda
  • They target GPCRs Gi and Go
  • Their target has 7 transmembrane domains
  • A2B is the most important type of receptor for analgesia and anesthesia
  • They’re used for sedation, chemical restraint, and analgesia, as well as for emesis in cats

Questão 100

Questão
Which of the following is not an effect of a2 agonists?
Responda
  • Depressive on the CNS, reduces blood flow and O2 consumption
  • Mild, dose dependent respiratory depression
  • Poor muscle relaxation
  • Analgesia
  • Biphasic cardiovascular response

Questão 101

Questão
Which of the following is false regarding a2 agonists?
Responda
  • It can be administered parenterally, orally, or epidurally
  • It’s synergistic with opioids, local anesthetics, and NMDA antagonists
  • Medetomidine has a strong correlation between the effect and plasma concentration
  • Bioavailability of medetomidine is 100% in dogs and cats

Questão 102

Questão
In which animal can a2 agonists cause hypercapnia?
Responda
  • Horse
  • Cattle
  • Sheep
  • Cat

Questão 103

Questão
In which animal does xylazine cause activation of pulmonary intravascular macrophages, resulting in acute lung injury?
Responda
  • Horse
  • Cattle
  • Sheep
  • Cat

Questão 104

Questão
Which animal has an a2D receptor, making them more susceptible to the effects of sedatives?
Responda
  • Horse
  • Cattle
  • Sheep
  • Cat

Questão 105

Questão
In whom can you use a2 agonists?
Responda
  • Patients with diabetes mellitus
  • Patients with epilepsy
  • Patients with compromised cardiac function
  • Agitated animals

Questão 106

Questão
Which of the following regarding a2 antagonists is true?
Responda
  • They’re competitive antagonists at the a1 receptor
  • They have varying effects on the a2 receptor
  • They have varying effects at the a1 receptor
  • All of the above are false

Questão 107

Questão
Which of the following is a non-selective a-adrenergic antagonist?
Responda
  • Tolazoline
  • Yohimbine
  • Atipamezole
  • Romifidine

Questão 108

Questão
True or false: the answer to the previous question also has histaminergic and cholinergic effects
Responda
  • True
  • False

Questão 109

Questão
Butyrophenone derivatives work via all of the following except:
Responda
  • Antagonism of the D2 receptor
  • Antagonism of the a2 receptor
  • Some antihistaminergic properties
  • All of the above are true

Questão 110

Questão
Which of the following is not an effect of butyrophenones?
Responda
  • CNS depressive
  • Cardiovascular depressive
  • Reduced muscle tone
  • Analgesia

Questão 111

Questão
ANESTHESIA & ANALGESIA: Which is not a post-synaptic target for these drugs?
Responda
  • AMPA receptors
  • Synaptic vesicle proteins
  • NMDA receptors
  • EAAT

Questão 112

Questão
Which receptor type is incorrectly matched with its number of subunits?
Responda
  • NMDA—7
  • AMPA—4
  • Kainite—5
  • All of the above are correct!

Questão 113

Questão
Which ion blocks NMDA receptors?
Responda
  • Ca
  • Na
  • Mg
  • K

Questão 114

Questão
Activation of glutamate receptors requires the binding of which of the following?
Responda
  • Glutamate
  • Glycine
  • Both
  • Neither

Questão 115

Questão
Where do almost all anesthetics potentiate the action of GABA?
Responda
  • GABA-A
  • GABA-B
  • GABA-C
  • Somewhere else entirely

Questão 116

Questão
Which ion passes through the channel in the GABA receptors?
Responda
  • Na
  • Ca
  • Cl
  • Mg

Questão 117

Questão
Generally how many subunits are present in GABA receptors?
Responda
  • 3
  • 4
  • 5
  • 6

Questão 118

Questão
True or false: tyrosine hydroxylase (TH) is the rate limiting step in dopamine neurotransmission
Responda
  • True
  • False

Questão 119

Questão
Which of the following dopamine receptors increase adenylate cyclase activity (thereby increasing cAMP)?
Responda
  • D1
  • D2
  • D3
  • D4

Questão 120

Questão
True or false: presynaptic receptors are the clinically relevant ones in the a2 adrenergic synapse (on the slide from the review…)
Responda
  • True
  • False

Questão 121

Questão
HISTAMINE & SEROTONIN: Which is false regarding autacoids?
Responda
  • They’re local hormones
  • They’re long-lived
  • They include histamine, serotonin, nitric oxide
  • They include angiotensin and eicosanoids

Questão 122

Questão
Which of the following is not mediated by H1?
Responda
  • Inflammation
  • Allergies
  • Gastric acid secretion
  • Anaphylaxis

Questão 123

Questão
Which of the following is an H3 effect?
Responda
  • Smooth muscle contraction
  • Relaxing small arterioles
  • Gastric acid secretion
  • Modulating neurotransmitter release in the CNS

Questão 124

Questão
Where do you not have H4 receptors?
Responda
  • Dendritic cells
  • Mast cells
  • Basophils
  • Eosinophils

Questão 125

Questão
Which of the following is false regarding the production of histamine?
Responda
  • You start with histidine
  • Histidine decarboxylase is the enzyme
  • The group removed to form histamine is CO2
  • All of the above are true!

Questão 126

Questão
Which of the following is true regarding histamine stores?
Responda
  • The mast cell pool synthesizes histamine more quickly than the non-mast cell pool
  • The non-mast cell pool occurs in basophils
  • The mast cell pool continuously synthesizes and releases histamine
  • The mast cell pool plays a key role in drug reactions

Questão 127

Questão
In order to release histamine from mast cells, the cells must become more permeable to which ion?
Responda
  • Na
  • Ca
  • Cl
  • K

Questão 128

Questão
Which of the following is not a role of histamine?
Responda
  • Stimulate sensory nerve endings
  • Relax arterioles
  • Decrease capillary permeability
  • All of the above are roles of histamine!

Questão 129

Questão
Which is not an effect of histamine on the cardiovascular system?
Responda
  • Dilation of terminal arterioles
  • Decrease in blood pressure briefly
  • Dilation of large arteries and veins
  • Edema from increased capillary permeability

Questão 130

Questão
Which of the following is true regarding histamine-mediated vasodilation?
Responda
  • H2 has a long duration
  • H1 mediated is slow onset
  • H2 is at small doses
  • H2 induces high levels of tachycardia

Questão 131

Questão
In which group of animals does histamine relax bronchial smooth muscle?
Responda
  • Rabbits and dogs
  • Calves and pigs
  • Cats and sheep
  • Humans and guinea pigs

Questão 132

Questão
Which other smooth muscles are contracted by histamine?
Responda
  • Intestinal muscle
  • Uterine smooth muscle
  • Neither
  • Both

Questão 133

Questão
Which of the following is true?
Responda
  • H1 is Gi while H2 is Gq
  • H1 is Gq while H2 is Gs
  • H1 is Gs, H2 is Gq
  • H1 is Gs, H2 is Gi

Questão 134

Questão
Which of these other receptors has the same pathway as endothelial H1 receptors?
Responda
  • Alpha 2
  • M3
  • D1
  • Nm

Questão 135

Questão
True or false: histamine is poorly absorbed from parenteral administration
Responda
  • True
  • False

Questão 136

Questão
Which is NOT part of the the metabolism of histamine:
Responda
  • Methylation and oxidation
  • Histamine N-methyltransferase enzyme acts on histamine to form methyl histamine (further acted upon by MAO)
  • Histaminase enzyme cleaves histamine into inactive metabolites
  • All of them are part of histamine metabolism

Questão 137

Questão
Which of the following is false regarding histamine agonists?
Responda
  • Histamine phosphate is used to test for achlorhydria
  • So is betazole
  • Betazole is more selective
  • Histamine phosphate is more selective

Questão 138

Questão
Which of the following will give you CNS sedation?
Responda
  • Cetirizine
  • Trimeprazine
  • Loratadine
  • Fexofenadine

Questão 139

Questão
Which of the following lacks antimuscarinic effects?
Responda
  • Chlorpheniramine
  • Clemastine
  • Dimenhydrinate
  • Desloratidine

Questão 140

Questão
Which of the following is false regarding the pharmacokinetics of antihistamines?
Responda
  • You can use them IV in emergencies (acute anaphylaxis)
  • You can use them topically
  • They don’t bind to plasma proteins
  • They’re excreted in urine and feces

Questão 141

Questão
Which is not a pharmacologic effect of antihistamines?
Responda
  • Vasodilation
  • Relaxation of bronchiolar smooth muscle
  • Relaxation of intestinal smooth muscle
  • Local anesthetic action
  • Anti-inflammatory response
  • Inhibits arterial hypertension
  • Anti-motion sickness

Questão 142

Questão
What is not a therapeutic use of antihistamines in bovines?
Responda
  • Bloat
  • Acetonemia
  • Mastitis
  • Gut edema
  • Metritis
  • Pregnancy toxemia
  • Pulmonary emphysema
  • Retained placenta

Questão 143

Questão
Which of the following is not a therapeutic use of antihistamines?
Responda
  • Myoglobinuria
  • Periodic opthalmia
  • Gastric stasis
  • Laminitis

Questão 144

Questão
Which antihistamine can cause polyphagia, sedation, increased vocalization, and vomiting in cats?
Responda
  • Cyproheptadine
  • Trimeprazine
  • Chlorpheniramine
  • Diphenhydramine

Questão 145

Questão
True or false: antihistamines can cause hyperexcitability and convulsions at high doses
Responda
  • True
  • False

Questão 146

Questão
Which is false regarding cromolyn sodium?
Responda
  • It inhibits the release of histamine from mast cells
  • It closes Cl- channels
  • It’s used for nasal allergies in horses
  • It’s used for conjunctivitis

Questão 147

Questão
True or false: serotonin is derived from tryptophan
Responda
  • True
  • False

Questão 148

Questão
Which of the following serotonin receptors is mismatched with their mechanism?
Responda
  • 5-HT1—Gi
  • 5-HT3—Gs
  • 5-HT5—Gi
  • 5-HT4--Gs
  • 5-HT2—Gq
  • 5-HT6—Gs
  • 5-HT7—Gs

Questão 149

Questão
Which of the following is false regarding the triphasic response to rapid IV injection of serotonin?
Responda
  • The Bezold-Jarisch reflex involves an initial fall in systemic arterial pressure with accompanying reflex tachycardia
  • The second phase is a short period of a pressor effect
  • The third phase is a prolonged fall in systemic BP
  • All of the above are correct!

Questão 150

Questão
Which of the following is not caused by serotonin?
Responda
  • Contraction of smooth muscles
  • Increased GIT motility
  • Decreased pulmonary pressure
  • Relaxation of bronchiolar smooth muscle

Questão 151

Questão
Which of the following is not an SSRI?
Responda
  • Sertraline
  • Fluoxetine
  • Paroxetine
  • Fluvoxamine
  • Buspirone

Questão 152

Questão
Which of the following serotonin agonists would you use to control postpartum hemorrhage and for uterine involution? (Hint: it’s an agonist of the 5-HT2 receptor!)
Responda
  • Cisapride
  • Ergometrine
  • Metoclopramide
  • Cyproheptadine

Questão 153

Questão
Which drug is used for constipation and megacolon in cats? (But let’s be honest here, all I care about is its use for stasis in rabbits.)
Responda
  • Cisapride
  • Ergometrine
  • Metoclopramide
  • Cyproheptadine

Questão 154

Questão
Which drug is an agonist of the 5-HT4 receptor and a D2 antagonist that, while being useful for gastric stasis and anti-emesis, can also change your mood/behavior?
Responda
  • Cisapride
  • Ergometrine
  • Metoclopramide
  • Cyproheptadine

Questão 155

Questão
Which antagonist of the 5-HT1 receptor (and first gen antihistamine) is used for head shaking in horses and feline asthma?
Responda
  • Ketaserin
  • Cyproheptadine
  • Methysergide
  • Ondansetron

Questão 156

Questão
Which of the following is an antagonist of the 5-HT2 receptor and alpha adrenergic receptor, antihistamine, and is used for glaucoma?
Responda
  • Ketaserin
  • Cyproheptadine
  • Methysergide
  • Ondansetron

Questão 157

Questão
Which drug (that sounds like a transformer) is used as an antiemetic during chemotherapy?
Responda
  • Ketaserin
  • Cyproheptadine
  • Methysergide
  • Ondansetron

Questão 158

Questão
Which 5-HT2 antagonist is used for carcinoid syndrome (cancerous tissues producing too much serotonin)?
Responda
  • Ketaserin
  • Cyproheptadine
  • Methysergide
  • Ondansetron

Semelhante

Veterinary Nursing Instruments
rowan.bray
Virus
Kahlen Ng
Veterinary Pathology
Marielle83
Pharmacology
Justin Veazey
Skin pathology
Justin Veazey
Parasites photos
Hannah Spicer
Thermoregulation
Joanne Wills
Prescriptions (veterinary)
Lyndsey Cullum
Principles of Veterinary Business
Florence Edwards
Animal parasites
Marielle83
Inflammation
Marielle83