Ammonia produced by metabolism is converted into urea in the liver and released into the blood which is filtered and excreted out by the kidneys. The urea produced by the liver will be first released into:
1. | Hepatic portal vein | 2. | Renal vein |
3. | Inferior vena cava | 4. | Hepatic vein |
I: | Glomerulus is a tuft of capillaries formed by the efferent arteriole |
II: | Afferent arteriole forms the peritubular capillary network |
III: | Vasa recta is absent or highly reduced in juxtamedullary nephrons |
1. | Only III is correct |
2. | I is correct but II and III are incorrect |
3. | I, II and III are incorrect |
4. | I and II are correct |
In a glomerulus
1. Afferent arteriole is thicker than efferent arteriole
2. Afferent capillaries are thicker than efferent capillaries
3. Afferent capillaries are thinner than efferent capillaries
4. Afferent arteriole are thinner than efferent arteriole