Question
11
Under normal circumstances which of the following is the primary mechanism for water loss by the body? A. Water lost via respiratory action B Water lost via sweat C. Water lost via feces D. Water lost via urine. When arterial blood pressure declines below normal, which of the following compensatory changes in activation? A. Afferent arteriolar vasoconstriction B Afferent arteriolar vasodilation C. Decreased Renin secretion D. Decreased ADH secretion E. None of the above Which of the following dysfunctions could impair one's ability to conserve water and concentrate urine? A. Blocking sodium reabsorption in the ascending loop of henle B. Blocking water reabsorption in the ascending loop of henle C. Increasing sodium reabsorption in the distal tubule D. Increasing potassium secretion at the collecting duct. Below is a listing of nephron components arts associated structures: 1. Descending limb of loop of Henle 2. Bowman's capsule 3. Collecting duct 4. Ascending limb of loop of Henle 5. Distal tubule 6. Proximal tubule
Explanation / Answer
9. water lost via urine. The body loses water primarily by excreting it in urine from the kidneys
11. Blocking water reabsorption in the ascending loop of henle. ADH hormone plays an vital role. Antidiuretic hormone binds to receptors on cells in the collecting ducts of the kidney and promotes reabsorption of water back into the circulation. In the absence of antidiuretic hormone, the collecting ducts are virtually impermeable to water, and it flows out as urine.
