Chapter 12 Test

If the normal pacemaker of the heart fails, the job will be taken over by the

AV node

The first Lubb heart sound is associated with

AV valves closing

Contraction of the upper chambers of the heart is called

Atrial systole

A common technique to improve blood flow and remove plaque in coronary vessels is

Balloon angioplasty and stent placement

The vessels that supply blood to the heart are called

Coronary arteries

Reduction in circulatory supply is called

Coronary ischemia

The right atrium receives

Deoxygenated blood from the vena cava

The apex of the heart lies superior to the

Diaphragm

What will not decrease venous return.

Excessive water loss at the kidneys

The let atrium and ventricle are supplied blood by the

Left coronary artery

Diastolic pressure is the ______pressure during ventricular ________

Minimum,systole

The layer of the heart containing cardiac muscle is the

Myocardium

The fluid lubricating the opposing surfaces of membrane in the pericardial cavity is called

Pericardial dluid

The pacemaker of the heart is normally the

SA node

The Base of the heart is the portion that is most

Superior

The right atrium receives blood from the

Superior and Inferior vena cava

An accelerated heart rate above 100 beats per minute is called

Tachycardia

The right AV valve is the

Tricuspid

A midsagittal section through the trunk would divide the heart

Unequally, with most lying on the left side

Low pressure and slow flow rates are characteristics of favorable

Venous return

Relaxation of the lower chambers of the heart is called

Ventricular diastole