Q. No.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
Which one of the following pair of items correctly belongs to the category of organs
mentioned against it?
1. Analogous organs - Thorn of Bougainvillea and tendrils of Cucurbita
2. Vestigial organs - Nictitating membrane and blind spot in human eye
3. Excretory organs - Nephridia of earthworm and Malpighian tubules of cockroach
4. Homologous organs - Wings of honey bee and wings of crow
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
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