The reabsorption of water in the nephron is accomplished as it follows the osmotic gradient created by Na+ reabsorption.
Indicate whether the statement is true or false.
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Question 2) Atrial distension is a stimulus for the secretion of atrial natriuretic factor, which stimulates the reabsorption of sodium by the kidneys.
Indicate whether the statement is true or false.
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Question 3) Following hemorrhage, vasopressin secretion increases because of increased firing of hypothalamic osmoreceptors.
Indicate whether the statement is true or false.
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Question 4) Because fluid loss as sweat is isoosmotic, the baroreceptor reflexes are more important than osmoreceptor activity in restoring extracellular fluid volume after sweating.
Indicate whether the statement is true or false.
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Question 5) A fall in the osmolarity of the blood supplying the hypothalamus is a powerful stimulus for thirst.
Indicate whether the statement is true or false.
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Question 6) Regulation of extracellular K+ is not critical to body function because only about 2 of the total-body K+ is in the extracellular fluid.
Indicate whether the statement is true or false.
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Question 7) In the absence of vasopressin, urine is isoosmotic with plasma.
Indicate whether the statement is true or false.
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Question 8) Unlike the renal cortical interstitial fluid, the interstitial fluid of the medulla is hyperosmotic.
Indicate whether the statement is true or false.
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Question 9) Increasing the GFR tends to increase the excretion rate of sodium.
Indicate whether the statement is true or false.
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Question 10) The walls of the ascending limb of the loop of Henle are freely permeable to water.
Indicate whether the statement is true or false.
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