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.. (kahoot (the wall between the artia is the (interatrial septum), the…
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kahoot
the wall between the artia is the
interatrial septum
the loose fitting sac around the heart is lined by
parietal pericardium
the innermost layer of the heart wall is the
endocardium
the function of the venae cavae include which of the following
returning blood to the atria
blood returning from the systemic circulation enter the
right atrium
blood is carried away from the heart by
arteries
the left atrium receives blood from the
pulmonary veins
the artioventricular valve o the left side of the heart is the
mitral valve
the tricuspid valve is located
between the right atrium and right ventricle
the average pressure in the right ventricle is
_
the pressure in the left ventricle
considerable lower than
list of vessels and structures that are associated with the heart
vena cavae, right atrium, right ventricle, pulmonary trunk, pulmonary veins, left atrium, left ventricle, aorta
the left and right coronary arteries carry blood to the
heart
the pulmonary arteries carry blood to the
lungs
the three layers of the heart wall are the
epicardium, myocardium, endocardium
atrioventricular valves prevent backflow into the
atria
the great and middle cardiac veins drain blood into the
coronary sinus
blood flowing from the left atrium to the left ventricle flows through the
__
valve
bicuspid, left av, mitral
blood from the systemic circulation returns to the heart by the way of the
venae cavae
the
__
circuit directly supplies blood to the myocardium
coronary
the ___ of the heart is located in the walls of the ventricles
purkinje fibers
depolarization of the atria is represented on an electrocardiogram by the
p wave
the QRS wave on an ECG tracing represents
ventricular depolarization
the second heart sound is heard when
the semilunar valves close
relaxation of the ventricles is called
ventricular diastole
which of the following is greater
the conduction velocity along a purkinje fiber
under condition of hypocalcemia
cardiac muscle contraction is weak
select the correct order of stimulation in the nodal pathways
SA node, AV node, AV bundle, Purkinje fibers
the maximum rate of contraction is normal cardiac muscles fibers is ___ per minute
200
which of the following is true regarding cardiac muscle
neither summation nor tetany can occur
cardiac muscle is similar to skeletal muscle in the
presence of striation
if the connection between the sa node and av node becomes blocked
the ventricles will beat independently of the atria
the T wave of the ECG corresponds to
ventricular repolarization
the amount of blood the heart pumps is one minute is
cardiac output
heart valves open and close because of
pressure differences
the amount of blood the heart beats in one contraction is the
sv
the
__
accelerates the heart rate when the walls of the right atrium are stretches
atrial reflex
according to starling law of the heart the cardiac output is directly related to the
venous return
which of the following is longest in duration of time
the refectory period of cardiac muscle
the amount of blood in each ventricle during isovolumertic relaxation is equal to the
ESV
the amount of blood in each ventricle during isovolumertic contraction is equal to the
EDV
cardiac output would be greatest when
symoathetic stimulation of the heart increases
EDV minus ESV equals
SV
preload directly determines
ene diastolic volume
when a chamber fills with blood and is preparing to begin the next cardiac cycle that chamber is
diastole and repolarizing
2 hormones that increase heart rate
epinephrine
noepinephrine
heart rate output
heart rate x stroke volume
hormone that decreases heart rate
citicoline
what prevent the av valve from prolapsing
korda tendinea
wave on an ecg represents depolarization of the atrium
p wave
what accelerate the heart rate when the walls of the right atrium are stretched
atrial reflex
the heart lies in the
mediastinum
what causes them to open and close
atrias relax, pressure differences