Because it is impossible to actively transport water, why does water leave the t
ID: 3472670 • Letter: B
Question
Because it is impossible to actively transport water, why does water leave the tubule and enter the interstitial space? a. Water is cotransported with solutes. b. Water goes from an area of low osmolarity to an area of high osmolarity. c. Water goes from an area of high osmolarity to an area of low osmolarity. d. Water goes from an area of low concentration to an area of high concentration. e. This is a trick question because water can be directly pumped by special proteins. If the efferent arteriole is constricted and the afferent arteriole dilated in a Bowman's capsule, the GFR would a. increase b. decrease. c. stay the same. The reflex is trigged by _____and leads to _____ a. ureter stretch -bladder contraction. b. bladder stretch - urine loss from the body. c. ureter contractions- urine loss from the body. d. urethra contractions- urine loss from the body. e. bladder stretch - urine movement from the bladder through the ureter. Which of the following is permeable to water? a. Ascending tubule b. Bladder c. Proximal convoluted tubule d. Ureter e. Urethra By the time urine reaches the _____it is no longer modified. a. renal pyramids b. ascending tubule c. descending tubule d. distal convoluted tubule e. proximal convoluted tubule If afferent arteriole blood pressure is increased by 15%, GFR will (assume that everything is working correctly) a. increase. b. decrease. c. stay the same. The last 5% to 10% of filtrate Na^+ can be reabsorbed by the _____of the nephron? a. ascending tubule b. descending tubule c. collecting duct segment d. distal convoluted segment e. proximal convoluted segment In the absence of ADH, I would expect the osmolarity of urine to be ____than the osmolarity of the peritubular space (interstitial space) a. equal to b. less than c. greater than Which of the following substances is not usually reabsorbed? a. H^+ b. HCO_3^- c. Glucose d. Na^+ e. Water Which segment of the nephron is under the regulation of aldosterone? a. Loop of Henle b. Collecting duct c. Ascending tubule d. Bowman's capsule e. Proximal convoluted tubuleExplanation / Answer
10. The third option (c) is correct. The passive transport of water enables the movement of water from high osmolarity to low osmolarity.
11. The first option (a) is correct; both will increase the filtration pressure.
12. The fourth option (d) is correct, it causes the urethra to contract and urges the urination.
13. The third option (c) is correct; this tubule absorbs 2/3 of water through the renal system.
14. The third option (d) is correct; the distal convoluted tubule contains the final volume of urine.
15. The second option (b) is correct. It will decrease the GFR.