Cardiac cycle

Valves are required to prevent backflow of blood

• in artery because pressure is low

• in vein because pressure is high

• in vein because pressure in not high

• in artery because pressure is not low

What does a, b, c, d signify in the image.

• artery, vein, RBC & capillary

• artery, vein, WBC & capillary

• artery, vein, RBC & arteriole

• vein, artery, RBC & capillary

In Double circulation blood passes through heart

• once

• twice

• once in one complete circulation

• twice in one complete circulation

Which one carry blood from the heart to the body

• pulmonary artery

• pulmonary vein

• aorta

• vena cava

Human heart is

• myogenic

• neurogenic

• myogenic initially

• neurogenic initially

Which one speed up the heart beat rate

• more carbon dioxide

• more oxygen

• lack of adrenalin

• all of the above

Heart sound produced by

• closure of valve in vein

• closure of valve in heart

• opening of valve in vein

• opening of valve in heart

Ventricular pressure increases as .............. contracts

Which one is not the wave of the ECG

• P wave

• QRS wave

• T wave

• D wave

Which is correct for the atherosclerosis

• Degenerative disease

• Macrophage decreases the growth factor

• Cholesterol builds up in the damaged area causes gain of elasticity

• Nono of the above