CVS_P1

The heart lies in the left half of the thoracic cavity

• True

• False

The left ventricle is a stronger pump than the right ventricle because more blood is needed to supply the body tissues than to supply the lungs

• True

• False

Entrance of Ca²⁺ through funny channels is responsible for the unique plateau phase of the action potential in cardiac contractile cells.

• True

• False

The atria and the ventricles each act as a functional syncytium.

• True

• False

The parallel arrangement of the vascular system enables each organ to receive its separate arterial blood supply.

• True

• False

More blood flows through the capillaries during cardiac systole than during diastole.

• True

• False

The same volume of blood passes through the capillaries in a minute as passes through the aorta, even though blood flow is much slower in the capillaries.

• True

• False

Because capillary walls have no carrier transport systems, all capillaries are equally permeable.

• True

• False

________ is a measure of the hindrance to blood flow through a vessel caused by friction between the moving fluid and the stationary vascular walls.

Local mechanisms that keep tissue blood flow fairly constant despite wide deviations in mean arterial driving pressure is termed as _________.