Which of the following statements is correct?
1. The ascending limb of the loop of Henle is impermeable to water
2. The descending limb of the loop of Henle is impermeable to water
3. The ascending limb of the loop of Henle is permeable to water
4. The descending limb of the loop of Henle is permeable to electrolytes

A decrease in blood pressure/volume will not cause the release of

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

Which one of the following correctly explains the function of a specific part of a human nephron?
1. Henle's loop - most reabsorption of the major substances from the glomerular filtrate
2. Distal convoluted tubule - reabsorption of ions into the surrounding blood capillaries
3. Afferent arteriole - carries the blood away from the glomerulus towards the renal vein
4. Podocytes- create minute spaces (slit pores) for the filtration of blood into the Bowman's capsule

Which one of the following is not a part of a renal pyramid?
1. Convoluted tubules
2. Collecting ducts
3. Loop of 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

Which one of the following statements is correct with respect to kidney function regulation?
1. Exposure to cold temperature stimulates ADH release
2. An increase in glomerular blood flow stimulates the formation of angiotensin II
3. During summer when the body loses a lot of water by evaporation, the release of ADH is suppressed
4. When someone drinks a lot of water, ADH release is suppressed

Which one of the following statements in regard to excretion by the human kidneys is correct?
1. Descending limb of loop of Henle is impermeable to water
2. Distal convoluted tubule is incapable of reabsorbing HCO^-₃ 
3. Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules
4. Ascending limb of loop of Henle is impermeable to electrolytes

The principal nitrogenous excretory compound in humans is synthesized
1. in kidneys but eliminated mostly through liver
2. in kidneys as well as eliminated by kidneys
3. in liver and also eliminated by the same through bile
4. in the liver, but eliminated mostly through kidneys

Uric acid is the chief nitrogenous component of the excretory products of
1. man
2. earthworm
3. cockroach
4. frog