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heart questions

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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