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In: Anatomy and Physiology

True/False (3 pts each) Indicate whether the statement is true or false. If true, explain why...


True/False (3 pts each)
Indicate whether the statement is true or false.
If true, explain why it is true and/or give examples to support it. If false, explain why it is false.
2.​An increase in plasma osmolality will cause more secretion of ADH.

Solutions

Expert Solution

An increase in plasma osmolality will cause more ADH secretion.

Answer: This is a true statement.

Explanation: - An increase in plasma osmolality causes hypothalamus to produce more antidiuretic hormone (ADH) which is transported to the posterior pituitary gland from where it is released into the blood stream.

- ADH acts on the collecting tubules and ducts of nephrons and increases the reabsorption of water from the tubules into the circulation thus increasing the fluid volume of blood and at the same time decreasing the volume and increasing the concentration of urine excreted.

- Water reabsorbed from the collecting tubules and ducts brings back the osmolality of plasma back to normal range.

- Thus, an increase in plasma osmolality will increase in ADH secretion which causes increased water reabsorption from the tubules of the nephrons (particularly collecting ducts and collecting tubules). This increase in water reabsorption from nephrons into circulation brings the osmolality of plasma back to normal range.

Sydney Mullin answered 1 year ago
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