What hormone's release is signaled to be suppressed when the body senses excess central fluid volume?
Answer
Antidiuretic Hormone (ADH)
When the body interprets the central fluid pooling caused by the cephalad shift as overhydration, it signals the regulatory systems to excrete the perceived excess water. A key mechanism for this is the suppression of Antidiuretic Hormone (ADH). ADH normally functions to promote water reabsorption in the kidneys, conserving fluid. When ADH levels drop due to the perceived central fluid surplus, the kidneys increase water excretion, leading to diuresis (increased urine output) in an attempt to restore fluid balance based on the altered sensory input.
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