Heart

Match the following

• Prevents backflow from the left ventricle to the left atrium

• Pulmonary valve

• Prevents backflow from the aorta to the left ventricle

• Tricuspid Valve

• Prevents backflow from the pulmonary artery to the right ventricle

• Mitral Valve

• Prevents backflow from the right ventricle to the right atrium

• Aortic valve

Put the correct order of blood flow through the heart.

• Left atrium

• Right ventricle

• Pulmonary arteries and veins

• Left ventricle

• Right atrium

Match the following

• A double-walled sac that surrounds the heart

• Endocardium

• The middle layer of the heart wall; composed of cardiac muscle

• Myocardium

• The serous membrane on the surface of the myocardium

• Epicardium

• The endothelial membrane that lines the chambers of the heart

• Pericardium

The point of maximum impulse of the heart is at the:

• mediastinum

• apex

• base

• aorta

The portion of the heart wall that lines the heart's chambers is the

• myocardium

• pericardium

• endocardium

• epicardium

Which heart valve controls the flow of blood between the left atrium and the left ventricle?

• Pulmonary valve

• Aortic valve

• Tricuspid valve

• Mitral valve

What is the name of the great vessel that supplies blood to the right atrium?

• Superior and Inferior vena cavae

• Aorta

• Pulmonary arteries

• Pulmonary veins

How does the myocardium receive its blood supply?

• It receives its supply of blood from the left ventricle.

• It receives its blood through the coronary sinus.

• It doesn't require any additional blood other than what flows through the chambers.

• It receives its blood through the right and left coronary arteries.

What is the heart's primary pacemaker?

• The atrioventricular (AV) node

• The Purkinje fibers

• The sympathetic nervous system

• The sinoatrial (SA) node

Tags

NGSS.MS-LS1-3

On an electrocardiogram, the QRS complex represents:

• atrial depolarization

• ventricular depolarization

• ventricular repolarization

• impulse transmission from the atria to the ventricles

Tags

NGSS.HS-PS2-5