What is the primary function of capillaries?

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 for the Western Maricopa Education Center (West-MEC) District Test. Use interactive quizzes and multiple choice questions, each with detailed explanations, to enhance your learning experience and confidence.

Multiple Choice

What is the primary function of capillaries?

Explanation:
Gas exchange occurs across capillary walls. Their surfaces are formed by extremely thin, one-cell-thick endothelial layers arranged in a vast network, which creates a huge surface area and slows blood flow just enough to maximize diffusion. This setup lets oxygen move from blood into surrounding tissues and carbon dioxide move from tissues into the blood, with the lungs using the same diffusion process to load oxygen and unload CO2. Capillaries aren’t primarily for storing blood, producing hormones, or conducting electricity—roles handled by veins/arteries, endocrine glands, and nervous or cardiac tissue, respectively.

Gas exchange occurs across capillary walls. Their surfaces are formed by extremely thin, one-cell-thick endothelial layers arranged in a vast network, which creates a huge surface area and slows blood flow just enough to maximize diffusion. This setup lets oxygen move from blood into surrounding tissues and carbon dioxide move from tissues into the blood, with the lungs using the same diffusion process to load oxygen and unload CO2. Capillaries aren’t primarily for storing blood, producing hormones, or conducting electricity—roles handled by veins/arteries, endocrine glands, and nervous or cardiac tissue, respectively.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy