Cardiovascular Physiology and Circulation Quiz

The left ventricle pumps oxygenated blood to the body.

Increased sodium intake can lead to an increase in blood pressure due to fluid retention.

The AV node delays the electrical impulse before passing it to the ventricles to ensure proper timing of contraction.

Red blood cells transport oxygen from the lungs to the tissues.

Arteries have thicker walls and maintain blood pressure by withstanding high pressure.

The cardiovascular system transports oxygen and nutrients throughout the body.

Cardiac output is the volume of blood pumped by each ventricle per minute.

Blood pressure is the force exerted by blood against the walls of the arteries.

The medulla oblongata regulates cardiovascular functions such as heart rate and blood pressure.

Veins contain valves to prevent backflow of blood.

Systole is the period when the ventricles contract and blood is ejected from the heart.

During exercise, cardiac output increases due to increased stroke volume and heart rate.

Stroke volume is the amount of blood ejected by one ventricle during each contraction.

Baroreceptors detect changes in blood pressure and send signals to regulate it.

Aldosterone, released by the kidneys, regulates blood pressure and volume by acting on the kidneys.

The superior vena cava carries deoxygenated blood from the body to the heart.

The SA node controls the heart rate by initiating electrical impulses.

The cardiac cycle refers to the alternating expansion and relaxation of the arterial walls with each heartbeat.

Cortisol is released by the adrenal glands in response to stress and can increase heart rate and blood pressure.

The pulmonary vein carries oxygenated blood from the lungs to the heart.

Vessel diameter is the primary determinant of resistance to blood flow in the circulatory system.

High levels of LDL cholesterol are a risk factor for the development of atherosclerosis.

Hematocrit is the percentage of blood volume occupied by red blood cells.

Stroke volume is the volume of blood pumped by each ventricle in one contraction.

The electrical signal originates in the SA node, initiating the heartbeat.