Malpighian body or the renal corpuscle is made up of:
1. Glomerular capillaries and PTCN
2. Bowman's capsule and renal tubules
3. Afferent and efferent arterioles
4. Glomerular capillaries and Bowman's capsule
Figure shows human urinary system with structures labelled A to D. Select option which correctly identifies them and gives their characteristics and / or functions.
1. | B-pelvis - broad funnel shaped space inner to hilum, directly connected to loops of Henle. |
2. | C- Medulla- inner zone of kidney and contains complex nephrons. |
3. | D- Cortex- outer part of kidney and does not contain any part of nephrons. |
4. | A- Adrenal gland- located at the anterior part of kidney; secretes catecholamines which stimulate glycogen breakdown. |
All of the following regarding juxtamedullary nephrons in human kidneys are correct except:
1. | the entire nephron is located in the superficial cortex of the kidney |
2. | the renal corpuscle comprises a glomerulus and a glomerular capsule |
3. | blood arrives at the glomerular capillaries via an afferent arteriole |
4. | the proximal convoluted tubule leads into a long nephron loop |
Assertion (A): | Juxtamedullary nephrons are key adaptation for water conservation in mammals. |
Reason (R): | Juxtamedullary nephrons constitute about 85% of all nephrons in the mammalian kidney. |
In the light of the above statements choose the correct answer from the options given below:
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
10 to 15 distinct conical or triangular structures in the human kidney are seen in renal ______ and are known as renal ____________.
1. | pelvis; calyces | 2. | medulla; pyramids |
3. | cortex; columns of Bertini | 4. | cortex; lobes |
I: | Each kidney of an adult human measures 10-12 cm in length, 5-7 cm in width and 2-3 cm in thickness. |
II: | The DCTs of many nephrons open into a straight tube called collecting duct. |
III: | Each nephron has two parts – the glomerulus and the renal tubule. |
IV: | The renal tubule begins with the proximal convoluted tubule. |
1. | Only I and II | 2. | Only I, II and III |
3. | Only II and III | 4. | I, II, III and IV |
I: | Formation of urine |
II: | Regulation of erythropoiesis |
III: | Regulation of calcium levels in body fluids |
1. | Only I | 2. | Only I and II |
3. | Only II and III | 4. | I, II and III |
I: | Vasa recta is absent or highly reduced in cortical nephrons. |
II: | Efferent arteriole forms a peritubular capillary network around renal tubules. |
The urine concentrating ability of mammals and birds is correlated with the length of their:
1. | ureters | 2. | proximal convoluted tubules |
3. | distal convoluted tubules | 4. | loops of Henle |