Michael is 26 years old. He becomes dehydrated after a long run if he has not drunk

enough. His infant son Sean, however, becomes dehydrated fairly frequently. This
difference in susceptibility to dehydration is because

A) adults drink more liquid.
B) infant kidneys are less able to conserve water.
C) the infant thirst mechanism is underdeveloped.
D) infants grow rapidly.


B

Anatomy & Physiology

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