Match the items given in column I with those in column II and select the correct option given below. [2018]
| Column I (Function) |
Column II (Part of excretory system) |
||
| A. | Ultrafiltration | (i) | Henle’s loop |
| B. | Concentration of urine | (ii) | Ureter |
| C. | Transport of urine | (iii) | Urinary bladder |
| D. | Storage of urine | (iv) | Malpighian corpuscle |
| (v) | Proximal convoluted tubule |
A–(iv), B–(v), C–(ii), D–(iii)
A–(iv), B–(i), C–(ii), D–(iii)
A–(v), B–(iv), C–(i), D–(ii)
A–(v), B–(iv), C–(i), D–(iii)
Human urine is usually acidic because [2015]
potassium and sodium exchange generates acidity
hydrogen ions are actively secreted into the filtrate
the sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries
excreted plasma proteins are acidic
Which of the following does not favour the formation of large quantities of dilute urine? [2015]
Renin
Atrial-natriuretic factor
Alcohol
Caffeine
(1)
Juxtaglomerular cells secrete an enzyme renin into blood. Renin changes plasma protein angiotensinogen to a peptide called angiotensin II. It increases the blood volume:
(i) by inducing proximal convoluted tubules to reabsorb more NaCl and water
(ii) stimulates the adrenal glands to release a hormone called aldosterone which induces the distal convoluted tubule to absorb more and water.
