Q. No.The urine concentrating ability of mammals and birds is correlated with the length of their:
1.
ureters
2.
proximal convoluted tubules
3.
distal convoluted tubules
4.
loops of Henle
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The part of the nephron that is least permeable to water is the:
| 1. ascending limb of the loop of Henle | 2. descending limb of the loop of Henle |
| 3. collecting duct | 4. proximal convoluted tubule |
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Glomerular ultrafiltrate would normally not contain:
1. plasma proteins
2. glucose and amino acids
3. water
4. urea
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The region of human kidney where you expect to find maximum osmolarity is:
1. at the top of the renal cortex
2. at the bottom of the renal cortex
3. at the top of the renal medulla
4. at the bottom of the renal medulla
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Sodium is the principal cation in blood. If the blood concentration of sodium ions gets below normal:
1. blood volume increases and blood pressure decreases
2. water drains from the collecting duct
3. blood volume and blood pressure decrease
4. ADH secretion increases
Mammals are:
1. osmoconformers.
2. hypotonic to their environment.
3. hypertonic to their environment.
4. osmoregulators.
The most toxic nitrogenous metabolic waste product is:
| 1. ammonia | 2. urea |
| 3. uric acid | 4. methane |
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