Blood doping means use of banned substances by athletes that have a favorable effect on erythrocyte count by stimulating the bone marrow. The source of such a hormone can be the human:

1. Spleen

2. Heart 

3. Kidney

4. Lungs

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

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

When kidney of a person is damaged, he/she invariably suffers fom anaemia because

(1) RBCs pass through the glomerulus

(2) Sufficient erythropoietin is not produced

(3) haemoglobin is not synthesised sufficiently

(4) Iron and viatmin B-12 are not able to bind to haemoglobin.

Assertion             :       Kidneys maintain the osmotic concentration of the blood.

Reason      :       Kidneys eliminate either hypotonic or hypertonic urine according to the need of the body.

Human excretory system does not involve

1.Urethra

2.Vestibule

3.Bladder

4.Kidneys

Kidneys are situated in

1.Between the last thoracic and 5th lumbar vertebra

2.Between the last thoracic and 3rd lumbar vertebra

3.Between the last thoracic and 2nd lumbar vertebra

4.Between the last thoracic and first lumbar vertebra

 Which of the following options shows the incorrect measurements of an adult human kidney?

1.10-12 cm in length

2. Kidney weigh 240- 340 g

3. Thickness of kidney is 2-3 cm

4. 5-7 cm in width

An afferent arteriole is a fine branch of

1.Renal vein

2.Renal artery

3.Renal capsule

4.Reanal Glomerulus

Which of the following has no role in the elimination of excretory wastes?