heart questions

Created by christi_b_austin 

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The left side of the heart is considered the systemic circuit pump.

True

Into which chamber of the heart do the superior vena cava, inferior vena cava, and coronary sinus return deoxygenated blood?

Right atrium

Which chamber of the heart sends oxygenated blood to the aorta to the systemic circuit?

left ventricle

Which chamber of the heart receives oxygenated blood via the pulmonary circuit

left atrium

Cardiac tamponade results in ineffective pumping of blood by the heart because the excessive amount of fluid in the pericardial cavity will_____

prevent the heart from filling properly with blood

prevent the heart from filling properly with blood

left ventricle

The presence of an incompetent tricuspid valve would have the direct effect of causing ______

reduced efficiency in the delivery of blood to the lungs

Which heart chamber sends deoxygenated blood to the lungs?

right ventricle

Which valve is located between the right atrium and ventricle?

tricuspid valve

What causes heart sounds?

heart valve closure

The layers of the heart wall from superficial to deep are: __________.

epicardium, myocardium, and endocardium

The heart has __________ chambers and __________ valves.

4 and 4

What does NOT deliver blood to the right atrium?

pulmonary veins

The role of the coronary arteries is to __________.

Supply blood to the heart tissue

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

tricuspid

Which artery serves the myocardium of the lateral right side of the heart?

right marginal artery

From what vessel do the left and right coronary arteries arise?

aorta

What separates the parietal and visceral pericardium?

pericardial cavity

Which of the following is the outermost covering of the heart?

Fibrous pericardium

Which layer of the heart wall contracts and is composed primarily of cardiac muscle tissue?

myocardium

Into what vessel does the left ventricle eject blood?

aorta

Into which chamber do the pulmonary veins send blood?

left atrium

In an ischemic heart, the affected cardiac muscle cells are likely to have an altered ______.

resting membrane potential, The damaged tissue is normally replaced by scar tissue that lacks the normal cell structure of the original tissue. So "scarred" cardiac muscle would lack the pumps and channels that are necessary to establish resting membrane potential.

Which functional feature best describes the manner in which cardiac muscle contracts?

Automaticity (autorhythmicity) promotes the spontaneous contraction of the cardiac muscle cells.

Which of the following terms refers to a lack of oxygen supply to heart muscle cells?

Ischemia

What structures connect the individual heart muscle cells?

Intercalated discs

What is the source of ATP for cardiac muscle contraction?

cellular respiration

What causes heart sounds?

heart valve closure

A premature ventricular contraction is classified as a(n):

extrasystole.

The QRS complex on an electrocardiogram represents:

ventricular depolarization.

The first heart sound (the 'lub' of 'lub-dup') is caused by:

closure of the atrioventricular valves.

Which is correctly matched?

Quiescent period: total heart relaxation between heartbeats

Which of the following would increase heart rate?

epinephrine

What does the T wave of the electrocardiogram represent?

ventricular repolarization

Which heart chamber sends deoxygenated blood to the lungs?

right ventricle

Which of the following terms refers to a lack of oxygen supply to heart muscle cells?

ischemia

In a healthy individual which of the following would be low?

afterload

What is afterload?

back pressure exerted by arterial blood

Which portion of the electrocardiogram represents the depolarization wave received from the sinoatrial (SA) node through the atria?

p wave

Which portion of the electrocardiogram represents the time during which the atria repolarize?

qrs complex

During which portion of the electrocardiogram do the atria contract?

p-r interval

At what point in the cardiac cycle is pressure in the ventricles the highest (around 120 mm Hg)?

ventricular systole

Which of the following is NOT a factor that regulates stroke volume?

heart rate

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