Exam 30: Circulation of the Blood

Operation of the Starling law ensures that when the amount of blood returned to the heart is increased, stroke volume automatically increases to pump it out.

Local vasodilation or reactive hyperemia can be caused by the release of endothelin by the blood vessels.

An increase in aldosterone would cause an increase in blood volume.

As the elasticity of the artery wall decreases, the magnitude of the pulse wave increases.

Hemodynamics is the term used to describe a collection of mechanisms that influence the active and changing circulation of the blood.

Name and give the location of five places in the body where a pulse can be felt.

SV (stroke volume) * HR (heart rate) = CO (cardiac output).

Pulse is defined as the alternate expansion and recoil of an artery.

By the time the blood reaches the venous end of the capillaries, the pressure on the blood has reached 0 mm Hg.

The arterial pulse is caused by the ventricles of the heart; the venous pulse is caused by the atria of the heart.

Velocity of blood is relatively constant as blood flows from the aorta toward the capillaries.

In general, as stroke volume goes up, ejection fraction goes up.

Based on the Starling law of the heart, the greater the venous return, the stronger the heart contraction.

At rest most of the body's blood supply resides in the pulmonary loop.

Bleeding that occurs at a relatively slow, steady rate would indicate that the damaged blood vessel is most likely a vein.

The velocity of blood flow slows in the capillaries in association with an increase in total cross-sectional area.

Ejection fraction has no relation to the stroke volume.

In order for Korotkoff sounds to be heard, the cuff pressure must stay above systolic pressure.

To stop arterial bleeding, pressure must be applied between the damaged artery and the heart.

Circulatory shock caused by a drop in the amount of blood in the circulatory system is called _____ shock.