What is meant by pharmacokinetics?
The study of how drugs are absorbed, distributed, metabolized, and excreted by the body.
The study of how drugs interact with target cells or tissues to produce therapeutic effects.
The study of how drugs are formulated and delivered for administration.
The study of how drugs are regulated and controlled by government agencies.
The Correct Answer is A
Pharmacokinetics refers to the study of how drugs are absorbed, distributed, metabolized, and excreted by the body. It involves understanding the factors that can influence the movement of drugs within the body and how these factors can affect drug efficacy and safety.
b. This choice is incorrect because it describes pharmacodynamics, not pharmacokinetics. Pharmacodynamics is the study of how drugs interact with target cells or tissues to produce therapeutic effects.
c. This choice is incorrect because it describes the formulation and delivery of drugs, not their absorption, distribution, metabolism, and excretion. The formulation and delivery of drugs are important aspects of drug development and administration but are not part of pharmacokinetics.
d. This choice is incorrect because it describes the regulation and control of drugs by government agencies, not their absorption, distribution, metabolism, and excretion. The regulation and control of drugs are important aspects of ensuring their safety and efficacy but are not part of pharmacokinetics.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Intravenous administration has the fastest onset of action because drugs are injected directly into the bloodstream, allowing for immediate distribution throughout the body.
a. Oral administration has a slower onset of action because drugs must first pass through the gastrointestinal tract and be absorbed into the bloodstream.
c. Sublingual administration has a faster onset of action than oral administration, but slower than intravenous administration because drugs are absorbed through the mucous membranes under the tongue and must then enter the bloodstream.
d. Topical administration has a slower onset of action because drugs must first pass through the skin or mucous membranes before entering the bloodstream.
Correct Answer is B
Explanation
Drugs can cross cell membranes by passive diffusion or active transport to reach their site of action within cells or tissues. Passive diffusion occurs when drugs move from an area of high concentration to an area of low concentration, while active transport requires energy and a carrier protein to move drugs against a concentration gradient.
a. This statement is false because drugs are not distributed evenly throughout the body, but rather are distributed according to factors such as blood flow, tissue permeability, and protein binding.
c. This statement is false because while organs with high blood flow such as the liver and kidneys receive a large proportion of a drug dose, drugs can also be distributed to other organs and tissues.
d. This statement is false because some drugs can cross
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