Question

question 6
in the alveoli, most cells are considered:
a type i alveolar cells
b type ii alveolar cells
c type iii alveolar cells
d alveolar macrophages
question 7
hemoglobins affinity for oxygen would be decreased, shifting the oxygen dissociation curve to the right, under all of the following

Explanation:

• Type I alveolar cells: These are the most abundant cells in the alveoli. They form the wall of the alveoli and are thin, which is crucial for gas exchange (oxygen and carbon dioxide diffusion between the alveoli and the blood).
• Type II alveolar cells: They secrete surfactant, which reduces surface tension in the alveoli. While important, they are not the most abundant.
• Type III alveolar cells: Do not exist in the standard alveolar cell classification.
• Alveolar macrophages: These are immune - related cells (phagocytes) in the alveoli. They are not the most abundant cells.

Answer:

A. Type I alveolar cells