Pregunta 1
Pregunta
1. MUSCLE RELAXANTS: True or false: guaifenesin selectively depresses transmission at internuncial neurons in the spinal cord, brainstem, and subcortical areas
Pregunta 2
Pregunta
Which is not an effect of guaifenesin?
Respuesta
-
Depresses CNS giving sedation and muscle relaxation
-
Decrease BP which then returns to normal
-
High doses can cause respiratory depression
-
Analgesia
Pregunta 3
Pregunta
Which of the following is false regarding guaifenesin?
Respuesta
-
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
Pregunta 4
Pregunta
Which muscle relaxant requires artificial ventilation with use?
Respuesta
-
Guaifenesin
-
Neuromuscular blockers
-
That’s it…
Pregunta 5
Pregunta
Which type of neuromuscular block are agonists at the ACh receptor?
Respuesta
-
Depolarizing
-
Non-depolarizing
Pregunta 6
Pregunta
Which non-depolarizing neuromuscular blockers are incorrectly matched with their duration
Respuesta
-
Mivacurium—short
-
Tubocurarine, doxacurium, pancuronium, pipecuronium—long
-
Atracurium, rocurium, vecuronium—intermediate
-
All of the above are correct!
Pregunta 7
Pregunta
Which of the following causes initial muscle fasciculation?
Pregunta 8
Pregunta
Which of the following are competitive antagonists at the ACh nicotinic receptor?
Pregunta 9
Pregunta
Which of the following is not a depolarizing neuromuscular blocker?
Respuesta
-
Decamethonium
-
Suxamethonium
-
Mivacurium
Pregunta 10
Pregunta
On which of the following can you use anticholinesterase drugs to remove the effect?
Pregunta 11
Pregunta
True or false: the amount of fasciculation correlates with the post-operative muscle pain
Pregunta 12
Pregunta
Which of the following is not an effect of suxamethonium?
Pregunta 13
Pregunta
Which of the following does not influence the effect of muscle relaxants?
Respuesta
-
Other neuromuscular agents
-
Cholinesterase inhibitors
-
Aminoglycoside antibiotics
-
None of the above
Pregunta 14
Pregunta
Which of the following is the most sensitive to neuromuscular blockers?
Pregunta 15
Pregunta
In which species do you most commonly use neuromuscular blockers?
Respuesta
-
Pigs and cats
-
Dogs and horses
-
Cattle and sheep
-
Horses and cats
Pregunta 16
Pregunta
HEMOSTATIC AND ANTICOAGULANTS: Which of the following hemostatics can cause extensive intravascular clotting when administered intravenously?
Respuesta
-
Fibrinogen
-
Thromboplastin
-
Thrombin
-
Fibrin
Pregunta 17
Pregunta
What’s a good characteristic of a topical hemostatic?
Respuesta
-
Minimal tissue reactivity
-
Easy to sterilize and handle
-
Consist of either thrombin or collagen
-
All of the above
Pregunta 18
Pregunta
Which is used in measurement of prothrombin time during anticoagulant therapy?
Respuesta
-
Fibrinogen
-
Thromboplastin
-
Thrombin
-
Fibrin
Pregunta 19
Pregunta
Which topical hemostatic converts endogenous fibrinogen to fibrin for clot formation?
Respuesta
-
Fibrinogen
-
Thromboplastin
-
Thrombin
-
Fibrin
Pregunta 20
Pregunta
Which topical hemostatic can be used for bleeding from denuded mucous membranes, as an adhesive in skin grafts, and for massive blood loss?
Respuesta
-
Fibrinogen
-
Thromboplastin
-
Thrombin
-
Fibrin
Pregunta 21
Pregunta
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?
Respuesta
-
Fibrinogen
-
Thromboplastin
-
Thrombin
-
Fibrin
Pregunta 22
Pregunta
Is fibrin foam soluble?
Pregunta 23
Pregunta
What do you use absorbable gelatin sponge/gelfoam for?
Respuesta
-
Oozing from the surface area
-
Massive blood loss
-
Capillary/venous bleeding
-
Surgery of the liver and spleen
Pregunta 24
Pregunta
Which of the following should only be used temporarily because otherwise you’d get fractures and cysts?
Pregunta 25
Pregunta
Which are clinical uses of microcrystalline collagen?
Respuesta
-
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
Pregunta 26
Pregunta
Which topical hemostatic produces immediate vasoconstriction and controls bleeding from small vessels?
Pregunta 27
Pregunta
What’s the problem with high concentrations of styptics?
Pregunta 28
Pregunta
Which systemic hemostatic is used for emergency treatment of acute hemorrhagic syndromes with deficiency of clotting factors/platelets?
Respuesta
-
Vitamin K
-
Blood
-
Desmopressin acetate
-
Protamine sulfate
Pregunta 29
Pregunta
Which systemic hemostatic releases stored vWf from endothelial cell and macrophages and controls capillary bleeding from wounds?
Respuesta
-
Vitamin K
-
Blood
-
Desmopressin acetate
-
Protamine sulfate
Pregunta 30
Pregunta
Which systemic hemostatic is made from fish sperm?
Respuesta
-
Vitamin K
-
Blood
-
Desmopressin acetate
-
Protamine sulfate
Pregunta 31
Pregunta
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)?
Respuesta
-
Vitamin K
-
Blood
-
Desmopressin acetate
-
Protamine sulfate
Pregunta 32
Pregunta
Which systemic hemostatic aids in the production of clotting factors II, VII, IX, and X and should not be given IM or IV?
Respuesta
-
Vitamin K
-
Blood
-
Desmopressin acetate
-
Protamine sulfate
Pregunta 33
Pregunta
Repeated administration of which drug reduces its effectiveness?
Respuesta
-
Vitamin K
-
Blood
-
Desmopressin acetate
-
Protamine sulfate
Pregunta 34
Pregunta
Which anticoagulant should you not use for laboratory diagnostic purposes?
Respuesta
-
Sodium oxalate
-
Acid citrate dextrose
-
Sodium citrate
-
Edetate disodium
Pregunta 35
Pregunta
Which is not part of the mechanism of heparin?
Respuesta
-
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
Pregunta 36
Pregunta
Which of these describes the action of heparin?
Respuesta
-
Antithrombotic
-
Anticoagulatory
-
Neither
-
Both
Pregunta 37
Pregunta
Which of the following statements is false regarding heparin?
Respuesta
-
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
Pregunta 38
Pregunta
Which of the following is false regarding vitamin K antagonists?
Respuesta
-
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
Pregunta 39
Pregunta
Which of the following is false regarding fibrinolytic agents?
Respuesta
-
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
Pregunta 40
Pregunta
Which of the following irreversibly binds COX in order to inhibit thromboxane A2 and prostaglandins?
Respuesta
-
Aspirin
-
Clopidogrel
-
Dipyrimadole
-
Ticlopridine
Pregunta 41
Pregunta
Which of the following inhibits phosphodiesterase, increasing cAMP levels in platelets, which inhibits aggregation?
Respuesta
-
Aspirin
-
Clopidogrel
-
Dipyrimadole
-
Ticlopidine
Pregunta 42
Pregunta
Which of the following is a P2Y12 receptor inhibitor, resulting in more cAMP and less aggregation of platelets?
Respuesta
-
Aspirin
-
Dipyrimadole
-
Ticlopidine
Pregunta 43
Pregunta
ANTICONVULSANTS: True or false: seizures are associated with episodic high frequency discharge of impulses by a group of neurons
Pregunta 44
Pregunta
Which of the following neurotransmitters is not involved in epileptogenesis?
Respuesta
-
Glutamate
-
Aspartate
-
Glycine
-
GABA
Pregunta 45
Pregunta
Which of the following is a problem associated with seizures?
Pregunta 46
Pregunta
Which is not a drug used in emergency treatment of seizures that stimulates GABA?
Respuesta
-
Phenytoin
-
Barbiturates
-
Benzodiazepines
-
Valproate
Pregunta 47
Pregunta
Which of the following drugs is mismatched with its mechanism of action?
Respuesta
-
Carbamazepine—inhibition of Na channels
-
Zonisamide—inhibition of Ca channels
-
Propofol—inhibition of Ca channels
-
Phenytoin—inhibition of Na channels
Pregunta 48
Pregunta
Which of the following drugs is a GABA agonist?
Respuesta
-
Zonisamide
-
Carbemazepine
-
Lamotrigrine
-
Etomidate
Pregunta 49
Pregunta
True or false: benzodiazepines decrease frequency of opening of GABA receptors.
Pregunta 50
Pregunta
Which route should you not use for lorazepam or midazolam?
Respuesta
-
IV
-
IM
-
Intranasal
-
Intrarectal
Pregunta 51
Pregunta
Which benzodiazepine inhibits T-type calcium channels?
Respuesta
-
Diazepam
-
Clonazepam
-
Midazolam
-
Lorazepam
Pregunta 52
Pregunta
What is not a side effect of barbiturates?
Respuesta
-
Hepatotoxicity
-
Autoinduction of CYP450
-
Sedation
-
Anorexia
Pregunta 53
Pregunta
True or false: barbiturates enhance GABA A by increasing the frequency of opening of the chloride channel.
Pregunta 54
Pregunta
Which of the following drugs works by competing with chloride, hyperpolarizing the neuronal membranes?
Respuesta
-
Gabapentin
-
Midazolam
-
Potassium bromide
-
Phenobarbital
Pregunta 55
Pregunta
Which of the following can potassium bromide be used for?
Respuesta
-
Only emergencies
-
Only add on
-
Both
-
Neither
Pregunta 56
Pregunta
Which is not a mechanism of action of felbamate?
Respuesta
-
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
Pregunta 57
Pregunta
True or false: felbamate is well absorbed from oral administration and has a wide safety margin
Pregunta 58
Pregunta
Which of the following drugs has absorption depending on an L-amino acid carrier, making the process saturable?
Respuesta
-
Levetiracetam
-
Gabapentin
-
Felbamate
-
Phenobarbital
Pregunta 59
Pregunta
True or false: pregabalin has a long half life
Pregunta 60
Pregunta
Which of the following drugs works by binding to SV2A?
Respuesta
-
Zonisamide
-
Gabapentin
-
Felbamate
-
Levetiracetam
Pregunta 61
Pregunta
Which of the following drugs is partially excreted unchanged and partly glucuronidated?
Respuesta
-
Zonisamide
-
Gabapentin
-
Felbamate
-
Levetiracetam
Pregunta 62
Pregunta
Which of the following drugs weakly inhibits GABA transaminase and has some effect on sodium and T-type calcium channels?
Respuesta
-
Phenytoin
-
Valproate
-
Vigabatrin
-
Carbamazepine
Pregunta 63
Pregunta
Which of the following drugs is metabolized by mixed function oxidases and is well absorbed orally?
Respuesta
-
Phenytoin
-
Valproate
-
Vigabatrin
-
Carbamazepine
Pregunta 64
Pregunta
Which of the following drugs inhibits GABA transaminase by forming an irreversible covalent bond, resulting in increased GABA?
Respuesta
-
Phenytoin
-
Valproate
-
Vigabatrin
-
Carbamazepine
Pregunta 65
Pregunta
Which of the following is a tricyclic antidepressant with hepatic metabolism that is a strong inducer of hepatic enzymes?
Respuesta
-
Phenytoin
-
Valproate
-
Vigabatrin
-
Carbamazepine
Pregunta 66
Pregunta
BEHAVIOR MODIFIERS: Which of the following is not an indication of psychotropic drugs in vetmed?
Pregunta 67
Pregunta
Which of the following is false regarding MAOIs?
Respuesta
-
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
Pregunta 68
Pregunta
Which of the following is not associated with serotonin syndrome?
Respuesta
-
Hypertension
-
Hyperthermia
-
Metabolic alkalosis
-
Rhabdomyolysis
Pregunta 69
Pregunta
Which of the following is an example of an MAOI?
Respuesta
-
Selegiline
-
Amitriptyline
-
Clomipramine
-
Fluoxetine
-
Alprazolam
Pregunta 70
Pregunta
Which of the following is not an adverse effect of selegiline?
Respuesta
-
Hyperactivity
-
Stereotypic behavior
-
Phobias
Pregunta 71
Pregunta
Which of the following drugs is incorrectly matched with its indication?
Respuesta
-
Selegiline—dementia in dogs
-
Clomipramine—separation anxiety
-
Fluoxetine—aggression in male dogs
-
FFP—urine spraying in cats
Pregunta 72
Pregunta
7. True or false: SNRIs are metabolized via CYP450
Pregunta 73
Pregunta
What isn’t an adverse effect of SNRIs?
Respuesta
-
Hypertension
-
Tachycardia
-
Arrhythmia
-
Salivation
-
Constipation
Pregunta 74
Pregunta
Which of the following is true about SNRIs according to slide 11 (e.g. generally)?
Respuesta
-
They have antihistamine effects
-
They have anticholinergic effects
-
They’re alpha-1 antagonists
-
These are all true!
Pregunta 75
Pregunta
Which of the following is not an indication for SNRI use in dogs?
Pregunta 76
Pregunta
Which SNRI has analgesic properties?
Respuesta
-
Amitriptyline
-
Imipramine
-
Clomipramine
Pregunta 77
Pregunta
Which SNRI has equal effects on serotonin and norepinephrine?
Respuesta
-
Amitriptyline
-
Imipramine
-
Clomipramine
Pregunta 78
Pregunta
Which SNRI is used for separation anxiety and canine compulsive disorders?
Respuesta
-
Amitriptyline
-
Imipramine
-
Clomipramine
Pregunta 79
Pregunta
Which is an indication for SSRIs in cats?
Respuesta
-
Separation anxiety
-
Impulse aggression
-
Compulsive behavior
-
Dominance
Pregunta 80
Pregunta
Which is not an adverse effect of fluoxetine?
Respuesta
-
GI effects
-
Lethargy
-
Depression
-
Polyphagia
Pregunta 81
Pregunta
True or false: the metabolites of benzodiazepines are not active.
Pregunta 82
Pregunta
True or false: in a dopaminergic synapse the enzyme beta-dopamine hydroxyls is missing
Pregunta 83
Pregunta
Neuroleptics block which of the following?
Respuesta
-
ACH-M receptors
-
Alpha-adenoreceptors
-
Histamine receptors
-
Serotonin receptors
-
All of the above
Pregunta 84
Pregunta
Which of the following is an incorrect example of receptor cross talk?
Respuesta
-
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!
Pregunta 85
Pregunta
True or false: progestins and estrogen suppress the excitatory effects of glutamate.
Pregunta 86
Pregunta
True or false: it’s totally fine to combine MAOIs and TCAs.
Pregunta 87
Pregunta
SEDATIVES AND TRANQUILLIZERS: Which is not a therapeutic target for these?
Pregunta 88
Pregunta
Which is not a mechanism of action of phenothiazines?
Respuesta
-
Block D2 receptors in the CNS
-
Block alpha adrenoceptors in the CNS
-
Block D receptors in the periphery
-
Block alpha receptors in the periphery
Pregunta 89
Pregunta
What is not an effect of phenothiazines?
Respuesta
-
CNS depression
-
Peripheral vasodilation
-
Good muscle relaxation
-
Analgesia
Pregunta 90
Pregunta
True or false: phenothiazines have extensive hepatic metabolism and metabolites are excreted in bile
Pregunta 91
Pregunta
Which of the following is false?
Respuesta
-
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
Pregunta 92
Pregunta
Which is false about the mechanism of action of benzodiazepines?
Respuesta
-
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
Pregunta 93
Pregunta
Which GABA receptor subunit, when mutated, prevents binding of volatile and injectable agents?
Pregunta 94
Pregunta
Which of the following is not an effect of benzodiazepines?
Respuesta
-
Dose dependent muscle relaxation
-
Biphasic cardiovascular response
-
Mild respiratory repression
-
Dose dependent CNS depression
-
Analgesia
Pregunta 95
Pregunta
True or false: benzodiazepines are reduced or glucuronidated and either excreted via the kidneys (diazepam) or both in the kidney and bile (lorazepam)
Pregunta 96
Pregunta
Which benzodiazepine has active metabolites?
Respuesta
-
Midazolam
-
Zolazepam
-
Diazepam
-
Lorazepam
Pregunta 97
Pregunta
In which patients should you not use benzodiazepines?
Respuesta
-
Those with fear-induced aggression
-
Those with hypersensitivity to benzodiazepines
-
Those with hepatic dysfunction
-
All of the above
Pregunta 98
Pregunta
True or false: flumazenil is a benzodiazepine antagonist that has a high affinity for the BZ-binding sites.
Pregunta 99
Pregunta
Which of the following is false regarding a2 agonists?
Respuesta
-
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
Pregunta 100
Pregunta
Which of the following is not an effect of a2 agonists?
Respuesta
-
Depressive on the CNS, reduces blood flow and O2 consumption
-
Mild, dose dependent respiratory depression
-
Poor muscle relaxation
-
Analgesia
-
Biphasic cardiovascular response
Pregunta 101
Pregunta
Which of the following is false regarding a2 agonists?
Respuesta
-
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
Pregunta 102
Pregunta
In which animal can a2 agonists cause hypercapnia?
Pregunta 103
Pregunta
In which animal does xylazine cause activation of pulmonary intravascular macrophages, resulting in acute lung injury?
Pregunta 104
Pregunta
Which animal has an a2D receptor, making them more susceptible to the effects of sedatives?
Pregunta 105
Pregunta
In whom can you use a2 agonists?
Pregunta 106
Pregunta
Which of the following regarding a2 antagonists is true?
Respuesta
-
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
Pregunta 107
Pregunta
Which of the following is a non-selective a-adrenergic antagonist?
Respuesta
-
Tolazoline
-
Yohimbine
-
Atipamezole
-
Romifidine
Pregunta 108
Pregunta
True or false: the answer to the previous question also has histaminergic and cholinergic effects
Pregunta 109
Pregunta
Butyrophenone derivatives work via all of the following except:
Respuesta
-
Antagonism of the D2 receptor
-
Antagonism of the a2 receptor
-
Some antihistaminergic properties
-
All of the above are true
Pregunta 110
Pregunta
Which of the following is not an effect of butyrophenones?
Pregunta 111
Pregunta
ANESTHESIA & ANALGESIA: Which is not a post-synaptic target for these drugs?
Pregunta 112
Pregunta
Which receptor type is incorrectly matched with its number of subunits?
Pregunta 113
Pregunta
Which ion blocks NMDA receptors?
Pregunta 114
Pregunta
Activation of glutamate receptors requires the binding of which of the following?
Respuesta
-
Glutamate
-
Glycine
-
Both
-
Neither
Pregunta 115
Pregunta
Where do almost all anesthetics potentiate the action of GABA?
Respuesta
-
GABA-A
-
GABA-B
-
GABA-C
-
Somewhere else entirely
Pregunta 116
Pregunta
Which ion passes through the channel in the GABA receptors?
Pregunta 117
Pregunta
Generally how many subunits are present in GABA receptors?
Pregunta 118
Pregunta
True or false: tyrosine hydroxylase (TH) is the rate limiting step in dopamine neurotransmission
Pregunta 119
Pregunta
Which of the following dopamine receptors increase adenylate cyclase activity (thereby increasing cAMP)?
Pregunta 120
Pregunta
True or false: presynaptic receptors are the clinically relevant ones in the a2 adrenergic synapse (on the slide from the review…)
Pregunta 121
Pregunta
HISTAMINE & SEROTONIN: Which is false regarding autacoids?
Respuesta
-
They’re local hormones
-
They’re long-lived
-
They include histamine, serotonin, nitric oxide
-
They include angiotensin and eicosanoids
Pregunta 122
Pregunta
Which of the following is not mediated by H1?
Respuesta
-
Inflammation
-
Allergies
-
Gastric acid secretion
-
Anaphylaxis
Pregunta 123
Pregunta
Which of the following is an H3 effect?
Respuesta
-
Smooth muscle contraction
-
Relaxing small arterioles
-
Gastric acid secretion
-
Modulating neurotransmitter release in the CNS
Pregunta 124
Pregunta
Where do you not have H4 receptors?
Respuesta
-
Dendritic cells
-
Mast cells
-
Basophils
-
Eosinophils
Pregunta 125
Pregunta
Which of the following is false regarding the production of histamine?
Respuesta
-
You start with histidine
-
Histidine decarboxylase is the enzyme
-
The group removed to form histamine is CO2
-
All of the above are true!
Pregunta 126
Pregunta
Which of the following is true regarding histamine stores?
Respuesta
-
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
Pregunta 127
Pregunta
In order to release histamine from mast cells, the cells must become more permeable to which ion?
Pregunta 128
Pregunta
Which of the following is not a role of histamine?
Respuesta
-
Stimulate sensory nerve endings
-
Relax arterioles
-
Decrease capillary permeability
-
All of the above are roles of histamine!
Pregunta 129
Pregunta
Which is not an effect of histamine on the cardiovascular system?
Respuesta
-
Dilation of terminal arterioles
-
Decrease in blood pressure briefly
-
Dilation of large arteries and veins
-
Edema from increased capillary permeability
Pregunta 130
Pregunta
Which of the following is true regarding histamine-mediated vasodilation?
Pregunta 131
Pregunta
In which group of animals does histamine relax bronchial smooth muscle?
Respuesta
-
Rabbits and dogs
-
Calves and pigs
-
Cats and sheep
-
Humans and guinea pigs
Pregunta 132
Pregunta
Which other smooth muscles are contracted by histamine?
Respuesta
-
Intestinal muscle
-
Uterine smooth muscle
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Neither
-
Both
Pregunta 133
Pregunta
Which of the following is true?
Respuesta
-
H1 is Gi while H2 is Gq
-
H1 is Gq while H2 is Gs
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H1 is Gs, H2 is Gq
-
H1 is Gs, H2 is Gi
Pregunta 134
Pregunta
Which of these other receptors has the same pathway as endothelial H1 receptors?
Pregunta 135
Pregunta
True or false: histamine is poorly absorbed from parenteral administration
Pregunta 136
Pregunta
Which is NOT part of the the metabolism of histamine:
Respuesta
-
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
Pregunta 137
Pregunta
Which of the following is false regarding histamine agonists?
Respuesta
-
Histamine phosphate is used to test for achlorhydria
-
So is betazole
-
Betazole is more selective
-
Histamine phosphate is more selective
Pregunta 138
Pregunta
Which of the following will give you CNS sedation?
Respuesta
-
Cetirizine
-
Trimeprazine
-
Loratadine
-
Fexofenadine
Pregunta 139
Pregunta
Which of the following lacks antimuscarinic effects?
Respuesta
-
Chlorpheniramine
-
Clemastine
-
Dimenhydrinate
-
Desloratidine
Pregunta 140
Pregunta
Which of the following is false regarding the pharmacokinetics of antihistamines?
Respuesta
-
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
Pregunta 141
Pregunta
Which is not a pharmacologic effect of antihistamines?
Respuesta
-
Vasodilation
-
Relaxation of bronchiolar smooth muscle
-
Relaxation of intestinal smooth muscle
-
Local anesthetic action
-
Anti-inflammatory response
-
Inhibits arterial hypertension
-
Anti-motion sickness
Pregunta 142
Pregunta
What is not a therapeutic use of antihistamines in bovines?
Respuesta
-
Bloat
-
Acetonemia
-
Mastitis
-
Gut edema
-
Metritis
-
Pregnancy toxemia
-
Pulmonary emphysema
-
Retained placenta
Pregunta 143
Pregunta
Which of the following is not a therapeutic use of antihistamines?
Respuesta
-
Myoglobinuria
-
Periodic opthalmia
-
Gastric stasis
-
Laminitis
Pregunta 144
Pregunta
Which antihistamine can cause polyphagia, sedation, increased vocalization, and vomiting in cats?
Respuesta
-
Cyproheptadine
-
Trimeprazine
-
Chlorpheniramine
-
Diphenhydramine
Pregunta 145
Pregunta
True or false: antihistamines can cause hyperexcitability and convulsions at high doses
Pregunta 146
Pregunta
Which is false regarding cromolyn sodium?
Respuesta
-
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
Pregunta 147
Pregunta
True or false: serotonin is derived from tryptophan
Pregunta 148
Pregunta
Which of the following serotonin receptors is mismatched with their mechanism?
Respuesta
-
5-HT1—Gi
-
5-HT3—Gs
-
5-HT5—Gi
-
5-HT4--Gs
-
5-HT2—Gq
-
5-HT6—Gs
-
5-HT7—Gs
Pregunta 149
Pregunta
Which of the following is false regarding the triphasic response to rapid IV injection of serotonin?
Respuesta
-
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!
Pregunta 150
Pregunta
Which of the following is not caused by serotonin?
Respuesta
-
Contraction of smooth muscles
-
Increased GIT motility
-
Decreased pulmonary pressure
-
Relaxation of bronchiolar smooth muscle
Pregunta 151
Pregunta
Which of the following is not an SSRI?
Respuesta
-
Sertraline
-
Fluoxetine
-
Paroxetine
-
Fluvoxamine
-
Buspirone
Pregunta 152
Pregunta
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!)
Respuesta
-
Cisapride
-
Ergometrine
-
Metoclopramide
-
Cyproheptadine
Pregunta 153
Pregunta
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.)
Respuesta
-
Cisapride
-
Ergometrine
-
Metoclopramide
-
Cyproheptadine
Pregunta 154
Pregunta
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?
Respuesta
-
Cisapride
-
Ergometrine
-
Metoclopramide
-
Cyproheptadine
Pregunta 155
Pregunta
Which antagonist of the 5-HT1 receptor (and first gen antihistamine) is used for head shaking in horses and feline asthma?
Respuesta
-
Ketaserin
-
Cyproheptadine
-
Methysergide
-
Ondansetron
Pregunta 156
Pregunta
Which of the following is an antagonist of the 5-HT2 receptor and alpha adrenergic receptor, antihistamine, and is used for glaucoma?
Respuesta
-
Ketaserin
-
Cyproheptadine
-
Methysergide
-
Ondansetron
Pregunta 157
Pregunta
Which drug (that sounds like a transformer) is used as an antiemetic during chemotherapy?
Respuesta
-
Ketaserin
-
Cyproheptadine
-
Methysergide
-
Ondansetron
Pregunta 158
Pregunta
Which 5-HT2 antagonist is used for carcinoid syndrome (cancerous tissues producing too much serotonin)?
Respuesta
-
Ketaserin
-
Cyproheptadine
-
Methysergide
-
Ondansetron