Question

in the alveoli, surfactant is secreted by:
a type i alveolar cells
b the epithelial tissue
c type ii alveolar cells
d alveolar macrophages
1 point
question 34
greater levels of total body water are found among
a women
b men

Explanation:

• Question 1: Type II alveolar cells are specialized cells in the alveoli that secrete surfactant. Surfactant reduces surface tension in the alveoli, preventing their collapse. Type I alveolar cells are thin - walled and form the wall of the alveoli for gas exchange. Epithelial tissue is a general tissue type (alveolar cells are part of epithelial tissue in the alveoli context, but not the specific secretory cells here). Alveolar macrophages are immune cells that remove debris.
• Question 2: Men generally have greater levels of total body water. This is because men typically have more muscle mass (which has a higher water content) compared to women, and women have more adipose tissue (which has a lower water content).

Answer:

• Question 1: C. Type II alveolar cells
• Question 2: B. Men