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When a person consumes a large amount of water, it significantly increases their body fluid volume. Which of the following correctly describes the subsequent physiological changes regarding the state of osmoreceptors, ADH release, and diuresis, respectively?

Options

  1. AActivated, Increased, Prevented
  2. BSuppressed, Decreased, Enhanced
  3. CSuppressed, Decreased, Prevented
  4. DActivated, Decreased, Enhanced

Correct answer

B. Suppressed, Decreased, Enhanced

Step-by-step solution

An increase in body fluid volume due to excess water consumption switches off (suppresses) the osmoreceptors. This suppression halts the stimulation of the hypothalamus, leading to a decrease in the release of Antidiuretic Hormone (ADH) from the neurohypophysis. Without the action of ADH, water reabsorption in the latter parts of the renal tubules decreases, which results in enhanced diuresis (increased urine volume). Option 1 is incorrect because fluid loss, not fluid gain, activates osmoreceptors. Option 3 is inc

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