Multiple choice

Which of the following statements concerning sodium and water regulation by kidneys 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 pituitary 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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