Multiple Choice
Gas exchange in the lungs occurs due to:
A) active transport of gases between the blood and the alveolus.
B) active transport of gases between hemoglobin and the alveolus.
C) passive diffusion of gases between the blood and the alveolus.
D) facilitated diffusion of gases between the blood and the alveolus.
E) facilitated diffusion of gases between the hemoglobin and the alveolus.
Correct Answer:

Verified
Correct Answer:
Verified
Q31: How are birds able to get fresh
Q80: Where do air from the nose and
Q81: One _ leads to each human lung.<br>A)larynx<br>B)bronchus<br>C)pharynx<br>D)trachea<br>E)bronchiole
Q82: Carbon dioxide can be transported in the
Q84: All respiratory systems have all of the
Q86: The cells that line the human respiratory
Q87: The respiratory system is regulated to maintain
Q88: The respiratory center is very sensitive to
Q89: What happens during countercurrent exchange?<br>A)Steep concentration gradients
Q90: The surface area-to-volume ratio (S/V)can be calculated