Excretory Products and Their Elimination — Page 2 | NEET Biology

Q11

Uric acid is nitrogenous waste in

A Mammals and molluscs

B Birds and lizards

C Frog and cartilaginous fishes

D Insects and bony fishes

Correct Answer

Option B

Solution

(b) Uricotelism is advantageous for animals needing to conserve water, like birds and lizards.

Q12

In Ornithine cycle, which one pair of the following wastes are removed from the blood?

A CO_2 and urea

B CO_2 and ammonia

C Ammonia and urea

D Urea and sodium salts

Correct Answer

Option B

Solution

(b) CO2 + 2NH3 → Urea + H2O; ammonia and CO2 are removed.

Q13

Solenocytes are the main excretory structures in

A Platyhelminthes

B Annelids

C Molluscs

D Echinodermates

Correct Answer

Option A

Solution

(a) Solenocytes (flame cells/protonephridia) are excretory organs in Platyhelminthes.

Q14

In ureotelic animals, urea is formed by the

A Arginine cycle

B Cori's cycle

C Ornithine cycle

D EM pathway

Correct Answer

Option C

Solution

(c) Urea is formed in the liver by the Ornithine cycle.

Q15

Select the option which shows correct matching of animal with excretory organs and excretory product

A Renal tubules - Uric acid

B Nephridial tubes - Ammonia

C Kidney - Urea (Salamander)

D Kidney - Urea

Correct Answer

Option C

Solution

(c) Salamander (Amphibia) excretes urea through kidneys.

Q16

Reabsorption of useful substances from glomerular filtrate occurs in

A Collecting tube

B Loop of Henle

C Proximal convoluted tubule

D Distal convoluted tubule

Correct Answer

Option C

Solution

(c) Most useful substances — glucose, amino acids, ions, water — are reabsorbed in PCT.

Q17

Proximal and distal convoluted tubules are parts of

A Seminiferous tubules

B Nephron

C Oviduct

D Vas deferens

Correct Answer

Option B

Solution

(b) Nephron consists of Bowman's capsule, PCT, Loop of Henle, and DCT.

Q18

Under normal conditions which one is completely reabsorbed in the renal tubule?

A Urea

B Uric acid

C Salts

D Glucose

Correct Answer

Option D

Solution

(d) Glucose is completely reabsorbed in the PCT under normal conditions.

Q19

Glucose is taken back from glomerular filtrate through

A Active transport

B Passive transport

C Osmosis

D Diffusion

Correct Answer

Option A

Solution

(a) Glucose is actively reabsorbed in the PCT via sodium-dependent glucose cotransporter (SGLT).

Q20

If kidney fails to reabsorb water, the effect on tissue would

A remain unaffected

B shrink and shrivel

C absorb water from blood plasma

D take more O2 from blood

Correct Answer

Option B

Solution

(b) Failure to reabsorb water leads to dehydration; tissues lose water content and shrink.