Which of the following statements APPLY/APPLIES to the nephron loop? A. Neither
ID: 178398 • Letter: W
Question
Which of the following statements APPLY/APPLIES to the nephron loop?
A.
Neither of its two thin segments is permeable to water
B.
The ascending limb is where 25% of Na+, K+, & Cl- are reabsorbed
C.
ADH is needed here to reabsorb water
D.
At its base (ìthe turnî) the tubular fluid is very concentrated (1200 mOsm)
E.
Only the descending limb is permeable to water
F.
A,C,E
G.
B,D,E
A.
Neither of its two thin segments is permeable to water
B.
The ascending limb is where 25% of Na+, K+, & Cl- are reabsorbed
C.
ADH is needed here to reabsorb water
D.
At its base (ìthe turnî) the tubular fluid is very concentrated (1200 mOsm)
E.
Only the descending limb is permeable to water
F.
A,C,E
G.
B,D,E
Explanation / Answer
The following statements APPLY/APPLIES to the nephron loop:
As 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 absense of antidiuretic hormone, the collecting ducts are virtually impermiable to water, and it flows out as urine, (colostate)
Based on this above information the option: C: ADH is needed here to reabsorb water is true
Within the nephron of the kindney, the descending limb of loop of Henle is the portion of the renal tubule constituting the first part of the loop of Henle. The descending limb of the loop of Henle is highly permeable to water, (Essentials of Human Physiology),
THE THIN DESCENDING LOOP (TDL)
· reabsorbs water (H2O) passively
· it is impermeable to sodium(Na)
· it allows the urine to be concentrated, the urine in the TDL is hypertonic, (interactive-biology)
Based on this above information the option: E: Only the descending limb is permeable to water is true
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