Which blood vessel type can widen or narrow to regulate heat loss from the body?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare effectively for the Challenge A Anatomy Test. Use flashcards and multiple choice questions with detailed explanations and hints to increase your understanding and retention. Prepare with the right tools to boost your exam readiness!

Multiple Choice

Which blood vessel type can widen or narrow to regulate heat loss from the body?

Explanation:
Regulating heat loss relies on changing blood flow to the skin. Capillaries are the vessels where heat exchange with the environment happens, and they can widen or narrow to adjust how much heat leaves the body. When the body needs to cool down, the vessels feeding the capillary beds dilate, increasing surface blood flow and promoting heat loss through radiation, convection, and evaporation. When conserving heat, they constrict, reducing surface blood flow and limiting heat loss. The other options aren’t blood vessels that regulate heat loss—those are skin layers or structures rather than vessels involved in vasomotion.

Regulating heat loss relies on changing blood flow to the skin. Capillaries are the vessels where heat exchange with the environment happens, and they can widen or narrow to adjust how much heat leaves the body. When the body needs to cool down, the vessels feeding the capillary beds dilate, increasing surface blood flow and promoting heat loss through radiation, convection, and evaporation. When conserving heat, they constrict, reducing surface blood flow and limiting heat loss. The other options aren’t blood vessels that regulate heat loss—those are skin layers or structures rather than vessels involved in vasomotion.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy