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What are the 4 chambers of the heart?

Right atrium, left atrium, right ventricule and left ventricle.

Why do the A-V vales close?

To prevent blood from flowing back into the atria when the ventricles are contracting.

Which blood vessel does NOT bring deoxygenated blood directly to the heart?

A. Pulmonary vein
B. Coronary Sinus
C. Inferior Vena cava
D. Superior Vena Cava

A. Pulmonary vein

A valve damaged by rheumatic fever fails to open completely. This is known as:

A. Stenosis
B. Heart Block
C. Ischemia
D. MI
E. Fibrillation

A. Stenosis

Which of the following represents the outermost layer of the heart?

A. Epicardium
B. Parietal pericardium
C. Myocardium
D. Subendocardium
E. Endocardium

A. Epicardium

Increased sympathetic stimulation will cause HR to______________.

Increase

The protein of bood that is involved in the clotting mechanism is:

A. Albumin
B. Globulin
C. Fibrinogen
D. None of the above

C. Fibrinogen

The visceral pericardium of the heart is also know as the:

A. Epicardium
B. Endocardium
C. Myocardium
D. None of the above

A. Epicardium

The common wall between the two atria of the heart is called the:

A. Interatrial septum
B. Interventricular sulcus
C. Interatrial sulcus
D. Interventricular septum

A. Interatrial septum

The pulmonary trunk branches into the right and left:

A. pulmonary arteries
B. pulmonary veins
C. coronary arteries
D. coronary veins

A. pulmonary arteries

The left atrioventricular valve is between the:

A. right atrium and right ventricle
B. left atrium and left ventricle
C. left ventricle and right ventricle
D. left atrium and right atrium

B. left atrium and left ventricle

Contractions of the heart are coordinated by the ______ cells that are part of the ______ system of the heart.

A. conducting; conducting
B. conducting; contractile
C. contractile; contractile
D. contractile; conducting

A. conducting; conducting

In the EKG, the repolarization of the atria is represented by the:

A. T Wave
B. P Wave
C. QRS complex
D. none of the above

D. none of the above

The most abundant protein in red blood cells is:

A. Hemoglobin
B. Albumin
C. Fibrinogen
D. Immunoglobulin

A. Hemoglobin

The formed element of blood include:

A. white blood cells
B. platelets
C. redbood cells
D. all of the above

D. all of the above

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