Following ingestion, a drug crosses a membrane from an area of ...

[ENagel]

Following ingestion, a drug crosses a membrane from an area of higher concentration to an area of lower concentration. This is an example of
 
  1. active transport.
  2. osmosis.
  3. diffusion.
  4. metabolism.

Question 2

Which of the following are the four categories of pharmacokinetics?
 
  1. Diffusion, active transport, interspersing, and storage
  2. Ingestion, metabolism, interspersing, and excretion
  3. Absorption, distribution, metabolism, and excretion
  4. Ingestion, settling, movement, and storage

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Answer to Question 1

Correct Answer: 3
Rationale: Diffusion is the movement of a chemical from an area of higher concentration to an area of lower concentration. Active transport is the movement of a chemical against concentration or gradient. Osmosis involves the movement of water, and metabolism involves chemical conversion. (pp. 3740)

Answer to Question 2

Correct Answer: 3
Rationale: The four categories of pharmacokinetics are absorption, distribution, metabolism, and excretion.

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