Multiple choice

Which of the following statements regarding sodium and water regulation by kidney is NOT true?

  1. Body volume is regulated by changing body sodium content and maintaining a normal osmolality.

  2. Body osmolality is usually regulated by changing body water content by keeping body sodium content constant.

  3. Stretch receptors provide information about body volume .

  4. The receptors in the puituitary provide information about osmolality.

  5. Renal sodium excretion is the main influence on body volume.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Body osmolality is sensed in the hypothalamus by osmoreceptors which influence thirst (water intake) and ADH (anti-diuretic hormone or vasopressin) secretion (which influences water output by the kidneys). 

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