Which of the following is an example of a general sense?

A. It helps in the transportation of oxygen across the alveolar membrane: Oxygen transport across the alveolar membrane depends on diffusion driven by concentration gradients, not directly on surfactant.

B. It increases the rate of oxygen absorption in the lungs: Surfactant does not directly increase oxygen absorption; it facilitates gas exchange indirectly by maintaining alveolar stability.

C. It reduces surface tension to prevent alveolar collapse: Surfactant is a lipid-protein substance that lines alveoli, lowering surface tension. This prevents alveolar collapse during exhalation and allows easier expansion during inhalation, improving overall lung function.

D. It supports the structural integrity of the bronchial walls: Bronchial walls are supported by cartilage and smooth muscle, not surfactant, which primarily functions within the alveoli.

A. Compact bone: Compact bone forms the dense outer layer of bones, providing strength and support, but it does not actively participate in blood cell production.

B. Yellow bone marrow: Yellow bone marrow mainly consists of adipose tissue and functions in fat storage. It plays a minimal role in hematopoiesis under normal conditions.

C. Red bone marrow: Red bone marrow is the primary site of hematopoiesis, producing red blood cells, white blood cells, and platelets. It is located in the medullary cavities of certain bones, such as the pelvis, sternum, and vertebrae.

D. Spongy bone: Spongy bone contains red bone marrow in its cavities, supporting hematopoiesis indirectly, but the structural bone tissue itself does not produce blood cells.