When the nurse administers a drug that must move from an area of low concentration to an area of high concentration, what will the drug require?
1. Simple diffusion
2. Active transport
3. An intravenous route
4. A transdermal delivery system
Correct Answer: 2
Rationale 1: The movement from high to low concentration involves simple diffusion.
Rationale 2: The movement from low to high concentration is against a gradient, and will require energy, via the process of active transport.
Rationale 3: Drugs can be given via any route, and need to move from an area of low to high concentration; they do not need to be given via IV.
Rationale 4: Drugs do not need to be given transdermally.
Global Rationale: The movement from low to high concentration is against a gradient, and will require energy, via the process of active transport. The movement from high to low concentration involves simple diffusion. Drugs can be given via any route, and need to move from an area of low to high concentration; they do not need to be given via IV. Drugs do not need to be given transdermally.
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