[MCQ]PHARMACODYNAMICS- Part 2

1. Which effect may lead to toxic reactions when a drug is taken continuously or repeatedly?
a) Refractoriness
b) Cumulative effect
c) Tolerance
d) Tachyphylaxis
2. What term is used to describe a more gradual decrease in responsiveness to a drug, taking days or weeks to develop?
a) Refractoriness
b) Cumulative effect
c) Tolerance
d) Tachyphylaxis
3. What term is used to describe a decrease in responsiveness to a drug which develops in a few minutes?
a) Refractoriness
b) Cumulative effect
c) Tolerance
d) Tachyphylaxis
4. Tachyphylaxis is:
a) A drug interaction between two similar types of drugs
b) Very rapidly developing tolerance
c) A decrease in responsiveness to a drug, taking days or weeks to develop
d) None of the above
5. Drug resistance is a term used to describe the loss of effectiveness of antimicrobial or antitumour drugs. This
consideration is:
a) True
b) False
6. Tolerance and drug resistance can be a consequence of:
a) Drug dependence
b) Increased metabolic degradation
c) Depressed renal drug excretion
d) Activation of a drug after hepatic first-pass
7. Tolerance and drug resistance can be a consequence of:
a) Change in receptors, loss of them or exhaustion of mediators
b) Increased receptor sensitivity
c) Decreased metabolic degradation
d) Decreased renal tubular secretion
8. Tolerance develops because of:
a) Diminished absorption
b) Rapid excretion of a drug
c) Both of the above
d) None of the above
9. Dependence is often associated with tolerance to a drug, a physical abstinence syndrome, and psychological
dependence (craving). This consideration is:
a) True
b) False
10. The situation when failure to continue administering the drug results in serious psychological and somatic disturbances is
called?
a) Tachyphylaxis
b) Sensibilization
c) Abstinence syndrome
d) Idiosyncrasy
11. What is the type of drug-to-drug interaction which is connected with processes of absorption, biotransformation,
distribution and excretion?
a) Pharmacodynamic interaction
b) Physical and chemical interaction
c) Pharmaceutical interaction
d) Pharmacokinetic interaction
12. What is the type of drug-to-drug interaction which is the result of interaction at receptor, cell, enzyme or organ level?
a) Pharmacodynamic interaction
b) Physical and chemical interaction
c) Pharmaceutical interaction
d) Pharmacokinetic interaction
13. What phenomenon can occur in case of using a combination of drugs?
a) Tolerance
b) Tachyphylaxis
c) Accumulation
d) Synergism
14. If two drugs with the same effect, taken together, produce an effect that is equal in magnitude to the sum of the effects of
the drugs given individually, it is called as:
a) Antagonism
b) Potentiation
c) Additive effect
d) None of the above
15. What does the term “potentiation” mean?
a) Cumulative ability of a drug
b) Hypersensitivity to a drug
c) Fast tolerance developing
d) Intensive increase of drug effects due to their combination
16. The types of antagonism are:
a) Summarized
b) Potentiated
c) Additive
d) Competitive
17. The term “chemical antagonism” means that:
a) two drugs combine with one another to form an inactive compound
b) two drugs combine with one another to form a more active compound
c) two drugs combine with one another to form a more water soluble compound
d) two drugs combine with one another to form a more fat soluble compound
018. A teratogenic action is:
a) Toxic action on the liver
b) Negative action on the fetus causing fetal malformation
c) Toxic action on blood system
d) Toxic action on kidneys
19. Characteristic unwanted reaction which isn’t related to a dose or to a pharmacodynamic property of a drug is called:
a) Idiosyncrasy
b) Hypersensitivity
c) Tolerance
d) Teratogenic action
20. Idiosyncratic reaction of a drug is:
a) A type of hypersensitivity reaction
b) A type of drug antagonism
c) Unpredictable, inherent, qualitatively abnormal reaction to a drug
d) Quantitatively exaggerated response
21. Therapeutic index (TI) is:
a) A ratio used to evaluate the safety and usefulness of a drug for indication
b) A ratio used to evaluate the effectiveness of a drug
c) A ratio used to evaluate the bioavailability of a drug
d) A ratio used to evaluate the elimination of a drug