Vasa recta in cortical nephrons :
1. Arises from afferent arteriole rather than efferent arteriole
2. Does not get involved in counter current exchange with loop of Henle
3. Carries deoxygenated blood rich in urea
4. Is absent or highly reduced
The network of peritubular capillaries is formed by
1. Efferent Arteriole
2. Afferent Arteriole
3. Efferent Arteries
4. Afferent Arteries
The concentrations of which plasma electrolyte is not regulated mainly by the kidneys?
1. hydrogen
2. potassium
3. iron
4. Bicarbonate
Which of the parts labeled A–D are correctly identified with their functions?
(1) A–Afferent arteriole – Carries the blood away from the glomerulus towards the renal vein
(2) B–Brush border – Create minute spaces epithelium for the filtration of blood into the Bowman’s capsule
(3) C–Henle’s loop – Maximum reabsorption of major substances from glomerular filtrate
(4) D–DCT – Secretion of K+ ions into the filtrate
In the accompanying diagram of a human nephron the functional parts are labelled as A, B, C, D, E.
Study the diagram to answer the questions given
P: | Active secretion of H+ and K+ into the filtrate occurs in which parts? |
Q: | Conditional reabsorption of Na+ and water is a function of |
R: | Reabsorption of water is minimum in which segment? |
Choose the correct option:
P | Q | R | |
1. | B,D | C | E |
2. | A,B,C | C | E |
3. | D,E | D | C |
4. | A,D,E | E | C |
Which section of the nephron follows the ascending limb of the loop of Henle?
1. descending limb of the loop
2. proximal convoluted tubule
3. distal convoluted tubule
4. collecting duct
Vasa recta is
1. A minute vessel
2. A minute artery
3. A minute vein
4. A minute veinule
Match the terms given in Column-I with their physiological processes given in column-II and choose the correct answer:
Column-I |
Column-II |
||
(A) |
Proximal convoluted tubule |
(i) |
Formation of concentrated urine |
(B) |
Distal convoluted tubule |
(ii) |
Filtration of blood |
(C) |
Henle’s loop |
(iii) |
Reabsorption of 70-80% of electrolytes |
(D) |
Counter-current mechanism |
(iv) |
Ionic balance |
(E) |
Renal corpuscle |
(v) |
Maintainance of a concentration gradient in the medulla |
1. (A)-(iii); (B)-(v); (C)-(iii); (D)-(ii); (E)-(i)
2. (A)-(iii); (B)-(iv); (C)-(i);(D)-(v);(E)-(ii)
3. (A)-(i);(B)-(iii); (C)-(ii); (D)-(v);(E)-(iv)
4. (A)-(iii) ; (B)-(i) ; (C)-(iv) ; (D)-(v) ; (E)-(ii)