Excretory Products and their Elimination

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

1. less amino acids in his urine
2. more glucose in his blood
3. less urea in his urine
4. more sodium in his urine

Angiotensinogen is a protein produced and secreted by

1. juxtaglomerular (JG) cells
2. macula densa cells
3. endothelial cells (cells lining the blood vessels)
4. liver cells.

Earthworms are -

1. Uricotelic when plenty of water is available
2. Ammonotelic when plenty of water is available
3. Ureotelic when plenty of water is available
4. Uricotelic under conditions of water scarcity

In ornithine cycle, which of the following wastes are removed from the blood?

1. CO2 and urea
2. Ammonia and urea
3. CO2 and ammonia
4. Urea and urine

The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is

1. 50 mm Hg
2. 75 mm Hg
3. 20 mm Hg
4. 30 mm Hg

A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of

1. fats
2. amino acids
3. glucose
4. ketones.

Uricotelism is found in

1. mammals and birds
2. fish and fresh water protozoans
3. birds, land reptiles and insects
4. frogs and toads

If Henle's loop were absent from mammalian nephron, which one of the following is to be expected?

1. There will be no urine formation.
2. There will be hardly any change in the quality and quantity of urine formed.
3. The urine will be more concentrated.
4. The urine will be more dilute.

Conversion of ammonia to urea is done by

1. ornithine cycle
2. arginine cycle
3. fumaric cycle
4. citrulline cycle

Concentration of urine depends upon which organ?

1. Bowman's capsule
2. Length of Henle's loop
3. PCT
4. Network of capillaries arising from glomerulus