The principal nitrogenous excretory compound in humans is synthesised.

1. in kidneys but eliminated mostly through liver

2. in kidneys as well as eliminated by kidneys

3. in liver and also eliminated by the same through bile

4. in the liver, but eliminated mostly through kidneys

Uric acid is the chief nitrogenous component of the excretory products of 

1. man                             

2. earthworm

3. cockroach                     

4. frog

A person who is on a long hunger strike and is surviving only on water, will have:

1. More sodium in his urine

2. Less amino acids in his urine

3. More glucose in his blood

4. Less urea in his urine

Angiotensinogen is a protein produced and secreted by:

1. Macula densa cells

2. Endothelial cells (cells lining the blood vessels)

3. Liver cells

4. Juxtaglomerular (JG) cells

In the presence of vasopressin, the greatest fraction of filtered water is absorbed in 

1. Loop of Henle

2. Proximal convoluted tubule

3. distal convoluted tubule

4. collecting tubule

Trimethylamine oxide is an excretory product in

1. fresh water teleosts

2. marine teleosts

3. marine invertebrate

4. none of these.

Which of the following are uricotelic animals?

1. Rohu and frog

2. Camel and frog 

3. Lizard and crow

4. Earthworm and eagle 

A person passes much urine and drinks much water but his blood glucose level is normal.

This condition may be the result of:

1. A reduction in insulin secretion from pancreas

2. A reduction in vasopressin secretion from posterior pituitary.

3. A fall in the glucose concentration in urine

4. An increase in secretion of glucagon

Which one of the following statements is correct with respect to salt water balance inside the body of living organisms?

Which one of the following is correct regarding the excretion?

1. Large amount of water from renal filtrate is reabsorbed in DCT and a less amount is reabsorbed by PCT.

2. The descending limb of loop of Henle is almost impermeable to salts.

3. Malpighian corpuscle is found in medulla region of kidney

4. The colour of urine is pale yellow and is slightly alkaline in nature.