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Class 11 Biology Chapter 19 Excretory Products And Their Elimination Quiz 8 (25 MCQs)

Quiz Instructions

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1. What is the function of the efferent arteriole in the nephron?

Correct Answer: A) Carries blood away from the glomerulus.

2. The role of the kidneys in homeostasis includes which of the following?

Correct Answer: D) All of these.

3. Peristaltic muscular contractions are important for conveying urine through the excretory system, much like peristalsis in the digestive tract. Peristalsis of the detrusor muscle of the urinary bladder is controlled by:

Correct Answer: C) Parasympathetic nervous impulses.

4. Which of the following is correct about protonephridia / flame cells?

Correct Answer: D) All.

5. The average amount of urea excreted out by person per day is

Correct Answer: A) 25-30gm.

6. In which of the following counter current operates-

Correct Answer: D) Between the 2 limb of Henle's loop and those of vasa recta.

7. Which group possess excretory organs known as Malpighian tubules?

Correct Answer: C) Insects.

8. Juxtaglomerular apparatus, a special sensitive cellular region is formed in

Correct Answer: D) DCT and afferent arteriole at the location of their contact.

9. Reabsorption of Na+ is controlled by-

Correct Answer: B) Aldosterone.

10. Kidney "stones"

Correct Answer: B) Are mineral crystals that form in urine inside the kidney.

11. What organ in the excretory system gets rid of carbon dioxide and water vapor?

Correct Answer: B) Lungs.

12. What will happen to glomerular filtration rate (GFR) if efferent arteriole smooth muscle is contracted?

Correct Answer: A) GFR will increase.

13. Vasa recta in cortical nephrons:

Correct Answer: D) 4. Is absent or highly reduced.

14. Renal corpuscle or Malpighian body is-

Correct Answer: B) Glomerulus along with Bowman's capsule.

15. Osmoreceptors in the body are activated by changes in-

Correct Answer: D) Blood volume, body fluid volume and ionic concentration.

16. For conservation of water terrestrial adaptation necessitated production of less toxic Nitrogenous wastes like

Correct Answer: A) Urea and Uric acid.

17. Statement I-Mammals have the ability to produce a concentrated urine.Statement II-The flow in both the limbs of Vasa recta and Henley's loop are in opposite direction.

Correct Answer: A) Both the statement are correct.

18. Which part of nephron helps in maintaining pH and ionic balance?

Correct Answer: C) PCT and DCT.

19. Which hormone facilitates water reabsorption in the kidneys?

Correct Answer: C) Antidiuretic Hormone (ADH).

20. What is the term for the inflammation of the glomeruli in the kidneys?

Correct Answer: B) Glomerulonephritis.

21. What is the primary function of the proximal convoluted tubule (PCT)?

Correct Answer: A) Reabsorption of nutrients.

22. Juxta glomerular apparatus is a special sensitive region formed by cellular modifications in the:

Correct Answer: B) DCT and the Afferent arteriole at the point of their contact.

23. Which of the following is responsible for the increase in sodium reabsorption in DCT?

Correct Answer: A) Increase in aldosterone levels.

24. Which of the following is the organ of excretion in mollusca?

Correct Answer: D) Both a & c.

25. What is the primary excretory structure in Platyhelminthes?

Correct Answer: A) Flame Cells.

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