Question detail
What is vasoconstriction?
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. Widening of blood vessels
- B. Narrowing of blood vessels
- C. Increased sweating
- D. Decreased heart rate
Answer
The correct option is Narrowing of blood vessels. This answer is correct because it matches the approved learning objective to describe vasoconstriction, reduced sweating and shivering as responses when body temperature is too low in the subtopic Control of body temperature (biology only).
Explanation
The correct option is Narrowing of blood vessels. Narrowing of blood vessels is correct because it directly supports the approved learning objective to describe vasoconstriction, reduced sweating and shivering as responses when body temperature is too low. 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
Understanding Responses to Cold
Students often confuse vasoconstriction with vasodilation, thinking both processes occur when body temperature is too low.
Remember that vasoconstriction narrows blood vessels to reduce heat loss, while vasodilation widens them to increase heat loss. Focus on the specific conditions that trigger each response.
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