Cardiac Cycle & Electrocardiogram

If there is higher pressure in the aorta, there will be no movement of blood out of the ventricle

• True

• False

The function of the atrium

• To collect blood

• To pump blood to the lungs

• To pump blood into systemic circulation

• To pump blood to the heart muscle

The entrance to the ascending aorta is guarded by

• an atrioventricular valve

• bicuspid valve

• semilunar valve

• tricuspid valve

The only time when all of the valves in the heart are close is during

• ventricular diastole

• isovolumetric contraction

• artrial systole

• isovolumetric diastole

The opening of semilunar valves is due to

• increased ventricular pressure

• decrease ventricular pressure

• increased aortic pressure

• increase in artrial volume

If ventricular pressure is low, what will happen to the arterioventricular valves?

• close

• open

During artrial systole, the ventricles are

• in systole

• in diastole

• contracting

• not filling

During isovolumetric ventricular contraction

• closure of semilunar valves

• closure of AV valves

• rushing of blood into ventricles

• contraction of atrial musculature

The relation with ECG, during third heart sound,

• coincides with R wave

• coincides or after submit of T waves

• between T & P wave

• between P and Q wave

Aortic pressure at its peak during

• arterial systole

• isovolumetric contraction

• ventricular ejection

• isovolumetric relaxation