131.

Which of the following is the correct pathway for propagation of cardiac impulse?

• SA node $\to$ AV node $\to$ Bundle of His $\to$ Purkinje fibres

• AV node $\to$ Bundle of His $\to$ SA node $\to$ Purkinje fibres

• SA node $\to$ Purkinje fibres $\to$ AV node $\to$ Bundle of His

• Purkinje fibres $\to$ AV node $\to$ SA node $\to$ Bundle of His

Pernicious anaemia results due to deficiency of

• vitamin-B₁

• vitamin-A

• vitamin-B₁₂

• iron

Calcium level decreases in the blood due to hyposecretion of

• parathyroid hormone

• calcitonin

• thyroxine

• adrenaline

Name the following having oxygen storing capacity

• myoglobin

• prophase- II

• anaphase- I

• metaphase- II

The blood vessel which supply oxygenated blood to cardiac tissue is

• coronary artery

• coronary vein

• coronary sinus

• pulmonary vein

Amount of oxygen supplied by 100 mL arterial blood while passing through the tissues is

• 0.4 - 0.6 mL

• 4 - 6mL

• 14 - 15 mL

• 19 - 20 mL

In a normal adult human, the average cardiac output (stroke volume) is

• 47 mL

• 70 mL

• 5 L

• 3.3 L

Which one of the following is incorrect for Atherosclerosis?

• Constriction of arterial luman reduces the blood flow

• Loss of dilatation ability of the arterial wall and its rupture

• Cholesterol deposition at the inner wall of the artery

• Proliferation of the vascular muscles

Juxtaglomerular apparatus is made up of

• juxtaglomerular cell, macula densa and lacis cell

• juxtaglomerular cell, Purkinje cell and chied cell

• juxtaglomerular cell, lads cell and myoepithelial cell

• juxtaglomerular cell, macula densa and Argentaffin cell

Which vitamin helps in blood coagulation?

• Vitamin- K

• Vitamin- C

• Vitamin- A

• Vitamin- D