Removal of proximal convoluted tubule from the nephron will result in

(1) more diluted urine

(2) more concentrated urine

(3) no change in quality and quantity of urine

(4) no urine formation

Which of the following statements is correct?

1. The ascending limb of loop of Henle is impermeable to water

2. The descending limb of loop of Henle is impermeable to water

3. The ascending limb of loop of Henle is permeable to water

4. The descending limb of loop of Henle is permeable to electrolytes

The part of nephron involved in active reabsorption of sodium is

1. distal convoluted tubule

2. proximal convoluted tubule

3. Bowman's capsule

4. descending limb of Henle's loop

In mammals, which blood vessel would normally carry largest amount of urea?

(1) Dorsal Aorta             

(2) Hepatic Vein

(3) Hepatic Portal vein     

(4) Renal vein

Human urine is usually acidic because

1. the sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular

capillaries

2. excreted plasma proteins are' acidic

3. potassium and sodium exchange generates acidity

4. hydrogen ions are actively secreted into the filtrate

Which of the following does not favor the formation of large quantities of dilute urine?

1. Alcohol 

2. Caffeine

3. Renin 

4. Atrial-natriuretic factor

Which of the following causes an increase in sodium reabsorption in distal convoluted

tubule?

1. Increase in aldosterone levels

2. Increase in antidiuretic hormone levels

3. Decrease in aldosterone levels

4. Decrease in antidiuretic hormone levels

Figure shows human urinary system with structures labelled A to D. Select option,

which correctly identifies them and gives their characterstics and/of functions.

1. A-adrenal gland located at the anterior part of kidney. Secrete catecholamines,

which stiumate glycogen breakdown

2. B-pelvis broad funnel shaped space inner to hilum, directly connected to loops of

Henle

3. C-mediulla-inner zone of kidney and contains complete nephrons

4. D-cortex-outer part of kidney and do not contain any part of neohrons

Which one of the following is not a part of a renal pyramid?

1. Convoluted tubules

2. Collecting ducts

3. Loops Henle

4. Peritubular capillaries

Uricotelic mode of passing out nitrogenous wastes is found in

1. birds and annelids

2. amphibians and reptiles

3. insects and amphibians 

4. reptiles and birds