Concentration of urine depends upon which part of the nephron ______.

(a)

Bowman's capsule

(b)

Length of Henle's loop

(c)

P.C.T.

(d)

Network of capillaries arising from glomerulus

A person who is on a long hunger strike and is surviving only on water, will have

(a)

Less amino acids in his urine

(b)

Macula densa cells

(c)

Less urea in his urine

(d)

More sodium in his urine

Aldosterone acts at the distal convoluted tubule and collecting duct resulting in the absorption of water through _____.

(a)

Aquaporins

(b)

Spectrins

(c)

GLUT

(d)

Chloride channels

Malpighian tubules remove excretory products from _____.

(a)

mouth

(b)

oesophagus

(c)

haemolymph

(d)

alimentary canal

____________is not a waste product.

(a)

Guanine

(b)

Creatinine

(c)

Urea

(d)

Ribose

The ureter, blood vessels enter the kidney through_____________

(a)

Hilum

(b)

Renal columns of Bertini

(c)

Hilus

(d)

Renal pelvis

Assertion (A): The decending limb of Henle's loop is permeable to water.
Reason (R): Aquaporins are the facilitators for water permeability.

(a)

A and R are wrong

(b)

R does not explain A

(c)

R explains A

(d)

A is right R is wrong

Countercurrent multiplier mechanism is possible because of the presence of_______________

(a)

Nephron

(b)

Collecting duct

(c)

Bowman's Capsule

(d)

Henle's Loop

Which is not a waste product?

(a)

Guanine

(b)

Creatinine

(c)

Urea

(d)

Ribose

Which is not a excretory organ?

(a)

Kidney

(b)

Lungs

(c)

Heart

(d)

Liver