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Practice each question, then open the answer or worked solution.
The following substances are the excretory products in animals. Choose
the least toxic form among them?
a. Urea
b. Uric acid
c. Ammonia
d. Carbon dioxide
Option (b) is the answer.
Filtration of the blood takes place at
a. PCT
b. DCT
c. Collecting ducts
d. Malpighian body
Option (d) is the answer.
Which of the following statements is correct?
a. ADH – prevents the conversion of angiotensinogen in the blood to angiotensin
b. Aldosterone – facilitates water reabsorption
c. ANF – enhances sodium reabsorption
d. Renin – causes vasodilation
Option (a) is the answer.
Which of the following is removed from our body by lungs?
a. CO2 only
b. H2O only
c. CO2 and H2O
d. Ammonia
Option (a) is the answer.
The pH of human urine is approximately
a. 6.5
b. 7
c. 6
d. 7.5
Option (c) is the answer.
Different types of excretory structures and animals are given below. Match
them appropriately and mark the correct answer from among those
given below:
Excretory structure/ organ Animals
A. Protonephridia i. Prawn
B. Nephridia ii. Cockroach
C. Malpighian tubules iii. Earthworm
D. Green gland or Antennal glands. Flatworms
a. A-iv, B-iii, C-ii, D-i
b. A-iii, B-i, C-iv, D-ii
c. A-iii, B-iv, C-ii, D-i
d. A-iii, B-i, C-ii, D-iv
Option (a) is the answer.
Which one of the following statements is incorrect?
a. Birds and land snails are uricotelic animals.
b. Mammals and frogs are ureotelic animals
c. Aquatic amphibians and aquatic insects are ammonotelic animals
d. Birds and reptiles are ureotelic
Option (d) is the answer.
Which of the following pairs is wrong?
a. Uricotelic ———- Birds
b. Ureotelic ———- Insects
c. Ammonotelic ———- Tadpole
d. Ureotelic ———- Elephant
Option (b) is the answer.
Which one of the following statements is incorrect?
a. The medullary zone of the kidney is divided into a few conical masses
called medullary pyramids projecting into the calyces.
b. Inside the kidney, the cortical region extends in between the
medullary pyramids as renal pelvis.
c. Glomerulus along with Bowman’s capsule is called the renal
corpuscle.
d. Renal corpuscle, proximal convoluted tubule (PCT) and distal
convoluted tubule (DCT) of the nephron are situated in the cortical
region of the kidney.
Option (b) is the answer.
The condition of accumulation of urea in the blood is termed as
a. Renal Calculi
b. Glomerulonephritis
c. Uremia
d. Ketonuria
Option (c) is the answer.