c. Ca++.
b. Na+. d. NaCl.
What will be an ideal response?
Question 2
Which of the following is true regarding the form or function of the alveoli?
A) The alveoli permit gas exchange between the lungs and bloodstream.
B) The alveoli are thin walled and covered by smooth muscle.
C) The alveoli are air passages that permit ventilation of the lung.
D) The alveoli are covered with small arteries that allow gas exchange.