🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books

Class 11 Biology Chapter 19 Excretory Products And Their Elimination Quiz 9 (25 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. What is the average weight of a human kidney?

Correct Answer: A) 120-170 g.

2. The part of nephron involved in active reabsorptionof sodium is

Correct Answer: A) Proximal convoluted tubule.

3. Which of the following is not part of renin angiotensin mechanism?

Correct Answer: D) Rennin.

4. Creatinine is formed by-

Correct Answer: C) Breakdown of creatine phosphate in muscle.

5. Uricotelic mode of excreting nitrogenous wastes isfound in

Correct Answer: A) Reptiles and birds.

6. As the concentrated filtrate pass upwards in ascending limb of Henley's loop it gets?

Correct Answer: B) Diluted.

7. What is the role of the loop of Henle in the nephron?

Correct Answer: A) Concentration of urine.

8. Which option shows correct Osmolarity variation from cortex to inner medulla (in mOsmol-1)

Correct Answer: A) 300-1200.

9. Assertion:Ammonia, as it is readily soluble, is generally excreted by diffusion across body surfaces or through gill surfaces as ammonium ions.Reason:Ammonia can be easily removed via kidneys.1. Both assertion and reason are true and reason is its correct explanation2. Both assertion and reason are correct but reason is not its correct explanation3. Assertion is correct but reason is false4. Both assertion and reason are false

Correct Answer: C) 3.

10. As ammonia is readily soluble, it is generally excreted by

Correct Answer: A) Diffusion.

11. What is the term for the elimination of urine from the body?

Correct Answer: A) Micturition.

12. Which of the following structures is involved in osmoregulation?

Correct Answer: B) All of the above.

13. What is the primary role of the distal convoluted tubule (DCT)?

Correct Answer: D) Secretion of ions.

14. Vasa recta is-

Correct Answer: C) U-shaped.

15. Of the filtrate, nearly how many of it is reabsorbed by the renal tubules?

Correct Answer: B) 99%.

16. The functioning of the kidneys is efficiently monitored and regulated by hormonal feedback mechanisms involving-

Correct Answer: D) Hypothalamus, JGA and heart (to certain extent).

17. Kidney failure is treatable.

Correct Answer: A) True.

18. What is the average daily urine output for an adult human?

Correct Answer: C) 1-1.5 liters.

19. What is the role of the liver in excretion?

Correct Answer: D) Secretes bile.

20. Which of the following processes of osmoregulation by the kidney is the least selective?

Correct Answer: D) Filtration.

21. Statement I-The ascending limb is permeable to water.Statement II-It allows transport of electrolytes only passively.

Correct Answer: B) Both the statements are incorrect.

22. In glomerulus, afferent arteriole-

Correct Answer: A) Is wider than efferent arteriole.

23. Which of the following statements regarding renal handling of water by the kidneys is correct?

Correct Answer: C) In the absence of vasopressin, the cortical collecting ducts have very low permeability to water.

24. PCT is lined by which epithelium?

Correct Answer: B) Simple Cuboidal Epithelium.

25. ..... are cells present in the Bowman capsule that wrap around the capillaries of the glomerulus.

Correct Answer: C) Podocytes.

🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books