Questão 1
Questão
Pharmacokinetics is:
Responda
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The study of biological and therapeutic effects of drugs
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The study of absorption, distribution, metabolism and excretion of drugs
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The study of mechanisms of drug action
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The study of methods of new drug development
Questão 2
Questão
What does “pharmacokinetics” include?
Responda
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Complications of drug therapy
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Drug biotransformation in the organism
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Influence of drugs on metabolism processes
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Influence of drugs on genes
Questão 3
Questão
What does “pharmacokinetics” include?
Responda
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Pharmacological effects of drugs
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Unwanted effects of drugs
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Chemical structure of a medicinal agent
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Distribution of drugs in the organism
Questão 4
Questão
The main mechanism of most drugs absorption in GI tract is:
Responda
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Active transport (carrier-mediated diffusion)
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Filtration (aqueous diffusion)
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Endocytosis and exocytosis
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Passive diffusion (lipid diffusion)
Questão 5
Questão
What kind of substances can’t permeate membranes by passive diffusion?
Responda
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Lipid-soluble
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Non-ionized substances
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Hydrophobic substances
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Hydrophilic substances
Questão 6
Questão
A hydrophilic medicinal agent has the following property:
Responda
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Low ability to penetrate through the cell membrane lipids
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Penetrate through membranes by means of endocytosis
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Easy permeation through the blood-brain barrier
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High reabsorption in renal tubules
Questão 7
Questão
What is implied by «active transport»?
Responda
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Transport of drugs trough a membrane by means of diffusion
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Transport without energy consumption
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Engulf of drug by a cell membrane with a new vesicle formation
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Transport against concentration gradient
Questão 8
Questão
What does the term “bioavailability” mean?
Responda
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Plasma protein binding degree of substance
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Permeability through the brain-blood barrier
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Fraction of an uncharged drug reaching the systemic circulation following any route administration
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Amount of a substance in urine relative to the initial doze
Questão 9
Questão
The reasons determining bioavailability are:
Responda
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Rheological parameters of blood
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Amount of a substance obtained orally and quantity of intakes
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Extent of absorption and hepatic first-pass effect
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Glomerular filtration rate
Questão 10
Questão
Pick out the appropriate alimentary route of administration when passage of drugs through liver is minimised:
Responda
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Oral
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Transdermal
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Rectal
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Intraduodenal
Questão 11
Questão
Which route of drug administration is most likely to lead to the first-pass effect?
Responda
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Sublingual
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Oral
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Intravenous
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Intramuscular
Questão 12
Questão
What is characteristic of the oral route?
Responda
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Fast onset of effect
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Absorption depends on GI tract secretion and motor function
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A drug reaches the blood passing the liver
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The sterilisation of medicinal forms is obligatory
Questão 13
Questão
Tick the feature of the sublingual route:
Responda
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A drug has a pretty fast absorption
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A drug is exposed to gastric secretion
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A drug is exposed more prominent liver metabolism
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A drug can be administrated in a variety of doses
Questão 14
Questão
Pick out the parenteral route of medicinal agent administration:
Responda
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Rectal
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Oral
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Sublingual
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Inhalation
Questão 15
Questão
Parenteral administration:
Responda
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Cannot be used with unconsciousness patients
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Generally results in a less accurate dosage than oral administration
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Usually produces a more rapid response than oral administration
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Is too slow for emergency use
Questão 16
Questão
What is characteristic of the intramuscular route of drug administration?
Responda
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Only water solutions can be injected
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Oily solutions can be injected
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Opportunity of hypertonic solution injections
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The action develops slower, than at oral administration
Questão 17
Questão
Intravenous injections are more suitable for oily solutions:
Questão 18
Questão
Correct statements listing characteristics of a particular route of drug administration include all of the following EXCEPT:
Responda
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Intravenous administration provides a rapid response
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Intramuscular administration requires a sterile technique
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Inhalation provides slow access to the general circulation
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Subcutaneous administration may cause local irritation
Questão 19
Questão
Most of drugs are distributed homogeneously.
Questão 20
Questão
Biological barriers include all except:
Responda
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Renal tubules
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Cell membranes
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Capillary walls
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Placenta
Questão 21
Questão
What is the reason of complicated penetration of some drugs through brain-blood barrier?
Responda
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High lipid solubility of a drug
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Meningitis
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Absence of pores in the brain capillary endothelium
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High endocytosis degree in a brain capillary
Questão 22
Questão
The volume of distribution (Vd) relates:
Responda
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Single to a daily dose of an administrated drug
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An administrated dose to a body weight
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An uncharged drug reaching the systemic circulation
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The amount of a drug in the body to the concentration of a drug in plasma
Questão 23
Questão
For the calculation of the volume of distribution (Vd) one must take into account:
Responda
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Concentration of a substance in plasma
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Concentration of substance in urine
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Therapeutical width of drug action
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A daily dose of drug
Questão 24
Questão
A small amount of the volume of distribution is common for lipophylic substances easy penetrating through barriers and widely distributing in plasma, interstitial and cell fluids:
Questão 25
Questão
The term “biotransformation” includes the following:
Responda
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Accumulation of substances in a fat tissue
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Binding of substances with plasma proteins
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Accumulation of substances in a tissue
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Process of physicochemical and biochemical alteration of a drug in the body
Questão 26
Questão
Biotransformation of the drugs is to render them:
Questão 27
Questão
Tick the drug type for which microsomal oxidation is the most prominent:
Responda
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Lipid soluble
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Water soluble
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Low molecular weight
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High molecular weight
Questão 28
Questão
Pick out the right statement:
Responda
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Microsomal oxidation always results in inactivation of a compound
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Microsomal oxidation results in a decrease of compound toxicity
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Microsomal oxidation results in an increase of ionization and water solubility of a drug
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Microsomal oxidation results in an increase of lipid solubility of a drug thus its excretion from the organism is facilitated
Questão 29
Questão
Stimulation of liver microsomal enzymes can:
Responda
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Require the dose increase of some drugs
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Require the dose decrease of some drugs
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Prolong the duration of the action of a drug
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Intensify the unwanted reaction of a drug
Questão 30
Questão
Metabolic transformation (phase 1) is:
Responda
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Acetylation and methylation of substances
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Transformation of substances due to oxidation, reduction or hydrolysis
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Glucuronide formation
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Binding to plasma proteins
Questão 31
Questão
Biotransformation of a medicinal substance results in:
Questão 32
Responda
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Process of drug reduction by special enzymes
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Process of drug oxidation by special oxidases
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Coupling of a drug with an endogenous substrate
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Solubilization in lipids
Questão 33
Questão
Which of the following processes proceeds in the second phase of biotransformation?
Responda
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Acetylation
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Reduction
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Oxidation
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Hydrolysis
Questão 34
Questão
Metabolic transformation and conjugation usually results in an increase of a substance biological activity:
Questão 35
Questão
In case of liver disorders accompanied by a decline in microsomal enzyme activity the duration of action of some drugs is:
Responda
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Decreased
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Enlarged
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Remained unchanged
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Changed insignificantly
Questão 36
Questão
Half life (t ½) is the time required to:
Responda
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Change the amount of a drug in plasma by half during elimination
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Metabolize a half of an introduced drug into the active metabolite
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Absorb a half of an introduced drug
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Bind a half of an introduced drug to plasma proteins
Questão 37
Questão
Half life (t ½) doesn’t depend on:
Questão 38
Questão
Elimination is expressed as follows:
Responda
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Rate of renal tubular reabsorption
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Clearance speed of some volume of blood from substance
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Time required to decrease the amount of drug in plasma by one-half
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Clearance of an organism from a xenobiotic
Questão 39
Questão
The most rapid eliminated drugs are those with high glomerular filtration rate and actively secreted but aren’t passively reabsorbed:
Questão 40
Questão
Systemic clearance (CLs) is related with:
Responda
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Only the concentration of substances in plasma
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Only the elimination rate constant
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Volume of distribution, half life and elimination rate constant
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Bioavailability and half life