How do the lungs absorb oxygen from the air while releasing carbon dioxide from the blood?
a. Oxygen diffuses into capillaries passively, while carbon dioxide is expelled from the body by the action of respiratory enzymes.
b. Transport proteins in the plasma membranes of alveoli cells actively transfer oxygen into the blood and carbon dioxide into the lungs.
c. Partial pressure gradients between alveoli and capillaries cause oxygen and carbon dioxide to diffuse in opposite directions.
d. Carbon dioxide is not present in capillaries; it is synthesized from oxygen within the alveoli cells within the lungs.
c. Partial pressure gradients between alveoli and capillaries cause oxygen and carbon dioxide to diffuse in opposite directions.
You might also like to view...
Which collagen type is most rigid and is very abundant in bones and tendons?
A. Type I B. Type II C. Type III D. Type IV E. Type V
Synthesizing a single glucose molecule requires the amount of energy stored in 54 ATP molecules, but when that glucose molecule is broken down, only enough energy to produce 36 to 38 ATP molecules is released. What happened to the remaining energy?
a. The extra energy is stored as adenosine diphosphate. b. Glucose molecules are never completely broken down. c. Some energy from metabolism is released as heat. d. Enzymes involved in this reaction absorb the extra energy.
Organisms living in deep-sea hydrothermal vents do not need light to obtain their energy
Indicate whether the statement is true or false
When a bud breaks of and makes a new organism it is called what?
What will be an ideal response?