1. The excretory organs in prawn are
a) Malpighian tubules
b) Nephridia
c) Kidneys
d) Green glands or antennal gland
Explanation: Green glands or antennal gland
2. Green glands are excretory organs of
a) Moths
b) Crayfishes
c) Scorpions
d) Spiders
Explanation: Crayfishes
3. Coxal glands are excretory organs in
a) Spiders and scorpions
b) Insects
c) Annelids
d) Molluscs
Explanation: Spiders and scorpions
4. Which of these parts in vertebrates functionally corresponds to the contractile vacuole of
protozoans?
a) Heart
b) Cloaca
c) Sweat glands
d) Kidneys
Explanation: Kidneys
5. In humans, the excretory system coexist of
a) Pair of kidneys
b) Pair of ureters
c) A urinary bladder and a urethra
d) All of these
Explanation: All of these
6. Kidneys in human is situated between __________.
a) T12–L3
b) T11–L2
c) T12–L1
d) T12–L5
Explanation: Kidneys in human is situated between T12–L3
7. The correct dimensions of human kidney are
Explanation: length-10–12 cm, Width-5–7 cm, Thickness-2–3 cm, Weight-120–170 gm
8.Which of the following is correct about hilum of kidney?
a) It is present on the convex outer surface.
b) It is present at the inner convex surface.
c) It is notch through which ureter, nerve and blood vessel enter.
d) It is the place where the calyces are open.
Explanation: "It is notch through which ureter, nerve and blood vessel enter". This is correct about hilum of kidney.
9. Which of the following is incorrect about human kidney?
a) Kidney is covered by tough capsule
b) Kidney is divided into cortex and medulla on the outer side
c) The cortex is extended in between the medullary pyramid and the renal column of bertini.
d) Kidney is situated close to the dorsal inner wall of abdominal cavity.
Explanation: "Kidney is divided into cortex and medulla on the outer side". This is incorrect about human kidney.
10. Each kidney has (nearly) how many nephrons?
a) 1 million
b) 2 million
c) ½ million
d) 3 million
Explanation: 1 million