Multiple Choice
All of the following factors would stimulate the hypothalamic thirst center EXCEPT __________.
26. Fluid and Electrolyte Balance, Acid Base Balance
Fluid Balance
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Which of the following individuals would have the most body water?
A
a healthy young female
B
a healthy young male
C
an older obese person
D
an infant
Verified step by step guidance1
Understand that body water content varies with age, sex, and body composition. Infants have the highest percentage of body water, typically around 70-80% of their body weight.
Recognize that as people age, the percentage of body water decreases. This is due to changes in body composition, such as increased fat and decreased muscle mass, which contain less water.
Consider that males generally have a higher percentage of body water compared to females because they typically have more muscle mass, which contains more water than fat tissue.
Note that obesity can further decrease the percentage of body water because fat tissue contains less water compared to lean tissue.
Conclude that among the given options, an infant would have the most body water due to their high percentage of body water relative to their body weight.
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