Uricotelism is found in:
1. Fishes and freshwater protozoans
2. Birds, reptiles, and insects
3. Frogs and toads
4. Mammals and birds
Concentration of urine depends upon which organ:
1. Bowman's capsule
2. Length of Henle's loop
3. P.C.T.
4. Network of capillaries arising from glomerulus
Which pair is correct:
1. Sweat = temperature regulation
2. Saliva = sense of food taste
3. Sebum = sexual attraction
4. Humerus = Hind leg
If Henle's loop was absent from mammalian nephron, which 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 diluted |
Which one of the following characteristics is common in both humans and adult frogs?
1. Internal fertilization
2. Nucleated RBCs
3. Ureotelic mode of excretion
4. Four-chambered heart
Which one of the following options gives the correct categorization of six animals according to the type of nitrogenous wastes (A, B, C) they give out?
A AMMONOTELIC |
B UREOTELIC |
C URICOTELIC |
|
1. | Frog, Lizards | Aquatic Amphibia, Humans | Cockroach, Pigeon |
2. | Aquatic Amphibia | Frog, humans | Pigeon, Lizards, Cockroach |
3. | Aquatic Amphibia | Cockroach, Humans | Frog, Pigeon, Lizards |
4. | Pigeon, Humans | Aquatic Amphibia, Lizards | Cockroach, Frog |
A fall in glomerular filtration rate (GFR) activates:
1. Adrenal cortex to release aldosterone
2. Adrenal medulla to release adrenaline
3. Posterior pituitary to release vasopressin
4. Juxta glomerular cells, to release renin
Select the correct statement:
1. | Atrial Natriuretic Factor increases the blood pressure. |
2. | Angiotensin II is a powerful vasodilator. |
3. | Counter current pattern of blood flow is not observed in vasa recta. |
4. | Reduction in Glomerular Filtration Rate activates JG cells to release renin. |
The increase in osmolarity from outer to inner medullary interstitium is maintained due to:
(i) | Close proximity between Henle's loop and vasa recta |
(ii) | Counter current mechanism |
(iii) | Selective secretion of HCO3¯ and hydrogen ions in PCT |
(iv) | Higher blood pressure in glomerular capillaries |
1. Only (ii)
2. (iii) and (iv)
3. (i), (ii), and (iii)
4. (i) and (ii)
1. | Pavo | 2. | Ornithorhynchus |
3. | Salamandra | 4. | Hippocampus |