Which of the following effects of aging impacts the oxygen carrying capacity of the cardiovascular system?

A. The liver may metabolize drugs differently as it ages.
B. The rate of movement through the large intestine increases with age.
C. The enamel on the teeth thins and the gingiva recedes allowing for increased tooth decay and loosening of the teeth.
D. Less intrinsic factor is produced resulting in less vitamin B12 absorption leading to possible pernicious anemia.


Answer: D

Anatomy & Physiology

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