Answer to Question 1
ANS: C
Chemical receptors in the aorta send signals to begin the inspiration process. The brain, lungs, and heart all are affected by this chemical reaction.
Answer to Question 2
ANS: A
The alveolus is a capillary membrane that allows gas exchange of oxygen and carbon dioxide during respiration. The alveoli do not store oxygen, regulate tidal volume, or produce hemoglobin.