Question detail
What happens to blood vessels during vasodilation?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The human nervous system
Question
- A. They constrict to reduce blood flow
- B. They expand to increase blood flow
- C. They remain unchanged
- D. They become rigid
Answer
The correct option is They expand to increase blood flow. This answer is correct because it matches the approved learning objective to apply thermoregulation knowledge to unfamiliar contexts involving heat transfer between the body and surroundings in the subtopic Control of body temperature (biology only).
Explanation
The correct option is They expand to increase blood flow. They expand to increase blood flow is correct because it directly supports the approved learning objective to apply thermoregulation knowledge to unfamiliar contexts involving heat transfer between the body and surroundings. This belongs to the subtopic Control of body temperature (biology only) within The human nervous system, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Control of body temperature (biology only).
Common mistake
Misunderstanding Heat Transfer
Students often confuse the concepts of heat transfer mechanisms (conduction, convection, radiation) and how they relate to thermoregulation.
Review the definitions and examples of each heat transfer mechanism, and practice applying these concepts to scenarios involving body temperature regulation.
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