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Class 11 Biology MCQ Chapter 16 Excretory Products and their Elimination
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Excretory Products and their Elimination
Chapter – 16
| UNIT – (V) HUMAN PHYSIOLOGY |
| MCQ |
1. The excretory system of human beings does not include-
(a) Pair of kidneys.
(b) Pair of eyes.
(c) Pair of ureters.
(d) Urinary bladder.
Ans: (a) Pair of kidneys.
2. The opening of urinary bladder is known as-
(a) Nephridia.
(b) Ureter.
(c) Urethra.
(d) More than one of the above.
Ans: (c) Urethra.
3. Name the organs that constitute the excretory system in humans.
(a) Two kidneys.
(b) Two ureters.
(c) Urinary bladder and urethra.
(d) More than one of the above.
Ans: (d) More than one of the above.
4. The normal value of GFR is approximately:
(a) 650 ml/min.
(b) 180 ml/min.
(c) 180 ml/day.
(d) 125 ml/min.
Ans: (d) 125 ml/min.
5. The main disadvantage of urea as an excretory product for animals eliminating it would be:
(a) Its high toxicity.
(b) Needs lot of water to be eliminated.
(c) It being an osmolyte.
(d) Energy expenditure to produce it.
Ans: (b) Needs lot of water to be eliminated.
6. Identify the correct statement regarding the excretion of acids by the human kidney.
(a) The filtered bicarbonate is absorbed by anion transport.
(b) The intercalated cells of the distal tubule secrete hydrogen ions to reabsorb bicarbonate from the tubular fluid.
(c) All of the filtered bicarbonate is normally reabsorbed in the first half of the distal tubule.
(d) Urine pH is normally greater than that of plasma.
Ans: (b) The intercalated cells of the distal tubule secrete hydrogen ions to reabsorb bicarbonate from the tubular fluid.
7. Which one of the following hormones reduces blood pressure?
(a) Antidiuretic hormone.
(b) Atrial Natriuretic factor.
(c) Aldosterone.
(d) Angiotensin-ll.
Ans: (b) Atrial Natriuretic factor.
8. What is used as an osmolyte in human beings to increase medullary interstitial osmolality during urine concentration?
(a) TMAO.
(b) Urea.
(c) Both a and b.
(d) Uric acid.
Ans: (b) Urea.
9. Which of the following sphincters cause the release of the urine?
(a) Cardiac sphincter.
(b) Pyloric sphincter.
(c) Urethral sphincter.
(d) Esophageal sphincter.
Ans: (c) Urethral sphincter.
10. The counter-current mechanism in the kidneys helps in:
(a) Producing dilute urine.
(b) Maintaining blood pH.
(c) Concentrating urine.
(d) Filtering blood.
Ans: (c) Concentrating urine.
11. Which of the following is not included in the excretory system of humans?
(a) Cloaca.
(b) Kidneys.
(c) Ureters.
(d) Urethra.
Ans: (a) Cloaca.
12. Which of these is an example of an ammonotelic organism?
(a) Mammals.
(b) Birds.
(c) Freshwater fish.
(d) Reptiles.
Ans: (c) Freshwater fish.
13. Dialysis is a process used to treat:
(a) Liver failure.
(b) Heart failure.
(c) Kidney failure.
(d) Lung infection.
Ans: (c) Kidney failure.
14. The Bowman’s capsule surrounds:
(a) Loop of Henle.
(b) Glomerulus.
(c) Collecting duct.
(d) Ureter.
Ans: (b) Glomerulus.
15. Which structure in the kidney collects the filtered urine?
(a) Renal artery.
(b) Renal vein.
(c) Renal pelvis.
(d) Urethra.
Ans: (c) Renal pelvis.
16. The excretory product of a cockroach is:
(a) Urea.
(b) Uric acid.
(c) Ammonia.
(d) Carbon dioxide.
Ans: (b) Uric acid.
