Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
Which part of the loop of Henle is highly permeable to water?
ascending limb
both descending and ascending limbs
descending limb
neither descending nor ascending limbs
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What is the sequence of events for water reabsorption from the loop of Henle?
water exits collecting duct and enters blood, descending limb concentrates ions, water exits ascending limb
water exits descending limb and enters blood, ascending limb concentrates ions, water exits collecting duct
water exits descending limb and enters ascending limb, ascending limb concentrates ions, water exits collecting duct
water exits ascending limb and enters blood, descending limb concentrates ions, water exits collecting duct
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How does the countercurrent multiplier system help concentrate urine?
by maintaining a water potential gradient along the collecting duct
by active transport of ions into the ascending limb
by setting up parallel flows of filtrate
by losing water from the collecting duct
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Which part of the loop of Henle actively pumps ions out into the interstitial space of the medulla?
descending limb
ascending limb
none of the loop
tip of the loop
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What causes the movement of water out of the filtrate in the collecting duct?
active transport of water
high solute concentration in the filtrate
high hydrostatic pressure
low water potential in the surrounding tissues
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What is the main effect of pumping ions out of the ascending limb?
decreasing water potential in the medulla
decreasing urine concentration
increasing blood flow to the loop of Henle
increasing water potential in the medulla
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Why does the loop of Henle function as a countercurrent multiplier system?
the flows of water are in opposite directions
the flows of filtrate are in the same direction
the flows of filtrate are in opposite directions
the flows of ions are in opposite directions
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How does having a countercurrent system help concentrate urine?
by losing more ions from filtrate
by maintaining a steep water potential gradient
by decreasing water reabsorption
by reducing active transport of solutes
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The main sections of the loop of Henle in the order that filtrate flows through them are the limb and the limb.
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State 2 ways in which the loop of Henle is adapted to carry out its function of concentrating urine.
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