As people age, red marrow is replaced by yellow marrow in many bones. This change primarily affects which function?

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Study for the Ivy Tech APHY 101 - Skeletal System Test. Enhance your learning with flashcards and multiple choice questions, each question includes hints and explanations. Prepare for success!

Multiple Choice

As people age, red marrow is replaced by yellow marrow in many bones. This change primarily affects which function?

Explanation:
Red marrow is where hematopoiesis occurs—the production of red blood cells, white blood cells, and platelets. As people age, much of this active marrow is replaced by yellow marrow, which primarily stores fat and does not participate in blood cell production. This shift reduces the body's ability to produce new blood cells, so hematopoietic capacity declines. The other ideas don’t fit because yellow marrow doesn’t increase blood cell production, its main role is fat storage, and marrow composition in adults isn’t what drives bone length growth.

Red marrow is where hematopoiesis occurs—the production of red blood cells, white blood cells, and platelets. As people age, much of this active marrow is replaced by yellow marrow, which primarily stores fat and does not participate in blood cell production. This shift reduces the body's ability to produce new blood cells, so hematopoietic capacity declines. The other ideas don’t fit because yellow marrow doesn’t increase blood cell production, its main role is fat storage, and marrow composition in adults isn’t what drives bone length growth.

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