BIO132 Chapter 14

The atria are also known as the discharging chambers.

The heart is located in the upper part of the mediastinum just behind the lungs.

The walls of the ventricles are much thinner than those of the atria.

The special sac covering the heart is known as the myocardium.

Cardiac tamponade is a serious, potentially life-threatening compression of the heart.

The bicuspid valve is located between the right atrium and right ventricle.

Once filled the atria contract to force blood out of the heart.

The semilunar valves are found between each ventricle and its corresponding artery.

Diastole refers to the heart in contraction.

If a valve is incompetent blood may backflow back into the chamber from which it came.

Blood leaving the superior vena cava enters which chamber of the heart?

Blood returning from the lungs enters the left ventricle.

Blood passes from the left atrium into the right ventricle.

The procedure involving harvesting of veins to bypass a blockage of the coronary artery is known as..

The heart's blood supply comes from the pulmonary artery.

The Bundle of His is also known as the pacemaker of the heart.

The AV node is located in the walls of the ventricles and contracts them.

Depolarization describes electrical activity that stimulates contractions.

Which of the following is a visible tracing of electrical signals in the heart?

Bradycardia occurs when the heart rate falls below

Tachycardia is a heart rate over...

Heart block occurs when blood is blocked from flowing.

What condition is a result of heart muscle contacting chaotically and irregularly?

A variation of heart rhythm during a breathing cycle is known as a sinus rhythm.

What term describes the volume of blood pumped by one ventricle in one minute?

The PNS can alter the heart's rhythm to increase or decrease.

The higher the venous return, the higher the stroke volume.

Failure of the right side of the heart is usually a result of the left side not functioning properly.