Question

TRUE OR FALSE

1.The amount of blood in the ventricles at the end of the ventricular filling phase is the end –systolic volume

2. The first branch of the aortic arch is the brachiocephalic artery, which divides into the left common carotid artery and the left subclavian artery.

3. Tissue perfusion to the heart decreases during systole and increases during diastole

4. Atrial systole is responsible for ejecting most of the blood into ventricles during the ventricular filling phase of the cardiac cycle

5. During heart transplant surgery, an electric shock is sometimes needed to make the donor heart beat properly because the electric shock activates the sympathetic nerve fibers in the ventricles.

6. People with type AB- (negative) blood are universal recipients because they have no antibodies to A, B or Rh in their blood and can receive red blood cells from a donor of any blood type.

Answer 1

1. The statement is False .

The amount of blood in the ventricles at the end of the ventricular filling phase is the diastolic volume not systolic volume.

2 .The statement is False .

Because Bracheocephalic trunk gives right common carotid artery and right subclavian artery.

3. The statement is True.

During systole the coronary blood vessels are compressed so the blood flow to the heart decreases.During diastole the coronary vessels are relaxed the blood flow to the heart muscles increases this results in increased perfusion.

4.The statement is  False.

Most of the blood is ejected into the ventricles during diastole bof atria and ventricle in ventricular filling phase.In diastole both atria and ventricles are relaxed blood from venacave and pulmonary veins flow into atria and then steadily flows into ventricles.At the end of diastole the atria contracts (systole) squirting a small amount of blood into the ventricles.

5.The statement is  False.

The electric shock in transplanted heart stimulates the sinus node of atria to conduct electrical impulses

6.The statement is False .

Because AB+ are universal recipients with no antibodies and contain Rh antigen.so this group don't have antibodies so they are universal recipients.