Question Detail

ZOO 101 Gas Exchange and Respiration in Mammals Objective Question
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Question

What maintains a steep concentration gradient for gas exchange in the alveoli?
Options
A Thick alveolar walls
B A dense network of capillaries
Correct Answer
C Mucus lining
D Cilia movement
Correct Answer

Option B is the correct answer.

Detailed Explanation

Each alveolus is wrapped in a dense network of capillaries, also one cell thick, which maintains a steep concentration gradient by constantly carrying blood away.

Hint

This extensive blood supply ensures that oxygen is quickly removed and carbon dioxide is delivered.

Question Info

Course: ZOO 101
Topic: Gas Exchange and Respiration in Mammals
Type: Objective
Difficulty: Not specified
Question 749 of 2214
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