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Question
Biology
Posted 10 months ago
An individual is working outside during the summer and is not taking
time to drink fluids to replenish water lost through moderate sweating.
Explain how his body will respond to this situation to avoid dehydration.
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Answer from Sia
Posted 10 months ago
Answer
The body will initiate several physiological responses to minimize water loss and maintain hydration.
Solution
a
Sensing dehydration: The hypothalamus in the brain detects increased blood osmolarity due to water loss
b
Release of ADH: The posterior pituitary gland releases antidiuretic hormone (ADH), which signals the kidneys to reabsorb more water
c
Reduced urine output: The kidneys respond to ADH by concentrating urine, thus conserving water in the body
d
Thirst mechanism: Dehydration triggers the thirst response, prompting the individual to drink fluids
e
Decreased sweating: The body may reduce sweat production to minimize further water loss
Key Concept
Homeostatic regulation of water balance
Explanation
The body employs a series of homeostatic mechanisms to regulate water balance and prevent dehydration, including hormone release, kidney function adjustment, and behavioral changes.

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