Biology Class 11th Chapter 19 mcqs

1. Presence of RBCs in urine is

(a) Uremia

(b) ketonuria

(c) Glucosuria

(d) hematuria

Answer: (d) hematuria

2. Ornithine cycle leads to the formation of

(a) NH₃

(b) ((NH₂)₂)CO)

(c) C₅H₄N₄O₃

(d) C₅H₄N₄

Answer: (b) ((NH₂)₂)CO)

3. The yellow pigment derived from heme breakdown and excreted by kidneys is

(a) Uric acid

(b) Urochrome

(c) Cholesterol

(d) Melanin

Answer: (b) Urochrome

4. What happens when glomerular filteration rate falls?

(a) Activation of podocytes

(b) Release of renin

(c) Repression of juxta glomerular cells

(d) None of the above

Answer: (b) Release of renin

5. Which of the following can be cured by hemodialysis?

(a) Renal calculi

(b) Glomerulonephritis

(c) Uremia

(d) All of these can be cured by hemodialysis

Answer: (c) Uremia

6. Kidneys are located in

(a) thoracic cavity

(b) abdominal cavity

(c) body cavity

(d) pelvic cavity

Answer: (b) abdominal cavity

7. The muscular tubes which take the urine from the kidneys to the bladder are

(a) Urinary bladders

(b) Ureters

(c) Urethras

(d) Nephrons

Answer: (b) Ureters

8. Most water and salts are reabsorbed in

(a) DCT

(b) Bowman s capsule

(c) PCT

(d) DCT and PCT

Answer: (c) PCT

9. Reabsorption of filterate occurs in

(a) renal tubules

(b) glomerular apparatus

(c) medullary pyramid

(d) juxta cells

Answer: (a) renal tubules

10. JG cells release

(a) angiotensin II

(b) aldosterone

(c) renin

(d) ANF

Answer: (c) renin

11. pH of human urine is

(a) 7.0

(b) 6.5

(c) 6.0

(d) 7.5

Answer: (b) 6.5

12. Average blood filtered by kidneys per minute is

(a) 1000 – 1500 mL

(b) 500 – 600 mL

(c) 200 – 300 mL

(d) 1100 – 1200 mL

Answer: (d) 1100 – 1200 mL

13. Kidneys are located in

(a) thoracic cavity

(b) abdominal cavity

(c) body cavity

(d) pelvic cavity

Answer: (b) abdominal cavity

14. Which one of the following statements in regard to the excretion by the human kidneys is correct?

(a) Ascending limb of Loop of Henle is impermeable to electrolytes

(b) Descending limb of Loop of Henle is impermeable to water

(c) Distal convoluted tubule is incapable of reabsorbing HCO3

(d) Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubules

Answer: (d) Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubules

15. In the kidneys, osmotic pressure controls ______.

(a) Glucose absorption

(b) Sodium absorption

(c) Water absorption

(d) none of these

Answer: (c) Water absorption

16. Presence of __________ in urine indicates diabetes mellitus.

(a) Glucose

(b) Cholesterol

(c) Ketone bodies

(d) Both 1 and 3

Answer: (d) Both 1 and 3

17. If a man takes large amount of protein, he is likely to excrete more amount of

(a) Glucose

(b) Urea and uric acid

(c) Water

(d) Salts

Answer: (b) Urea and uric acid

18. Nerves, blood vessels and ureter enters into the kidney through

(a) calyces

(b) hilum

(c) capsule

(d) cortex

Answer: (b) hilum

19. The principal nitrogenous excretory compound in humans is synthesized

(a) In the liver but eliminated mostly through kidneys

(b) In kidneys but eliminated mostly through liver

(c) In kidneys as well as eliminated by kidneys

(d) In liver and also eliminated by the same through bile

Answer: (a) In the liver but eliminated mostly through kidneys

20. The renal medulla consists of cone-shaped tissue masses called _______.

(a) Renal pyramid

(b) Adipose capsule

(c) Renal cortex

(d) Renal pelvis

Answer: (a) Renal pyramid