Which factors can lead to increased respiratory rate and depth? a. Increased level of CO2 b. Decreased level of CO2 c. Decreased blood pH d. Increased blood pH Which of the following is (are) not...

Which factors can lead to increased respiratory rate and depth?

a. Increased level of CO2

b. Decreased level of CO2

c. Decreased blood pH

d. Increased blood pH

Which of the following is (are) not present in the alveoli?

a. Surfactant-secreting cells

b. Dust cells

c. Red blood cells

d. Squamous epithelial cells

e. Capillary endothelial cells