Exam 30: Circulation of the Blood

Ejection fraction has no relation to the stroke volume.

Explain how the forces of osmotic pressure and hydrostatic pressure work to maintain a balance of fluid moving into and out of the capillary.

Orthostasis means "standing upright."

The blood-pumping action of respirations and skeletal muscle contractions are both important factors promoting the return of venous blood to the heart.

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

The effect of what substance is to increase the total blood volume?

The difference between systolic and diastolic pressures is termed pulse pressure.

List two factors that affect peripheral resistance. Explain how these factors influence arterial blood pressure. In normal blood flow, where is the major peripheral resistance encountered?

In a typical healthy heart, ejection fraction is between 80% and 85%.

The right atrium would have the lowest blood pressure in the systemic circulatory system.

Acetylcholine can increase the strength of contractions and therefore increase ejection fraction.

List two major factors that promote the return of venous blood to the heart. Explain how each facilitates venous return.

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