50 terms

heart exam review

heart study guide
T OR F: the mitral valve has chordae but the tricuspid valve does not
T OR F: the myocardium receives its blood supply from the coronary arteries
T OR F: trabeculae carneae are found in the ventricles and never the atria
T OR F: congestive heart failure means that the pumping efficiency of the heart is depressed so that there is inadequate delivery of blood to body tissues
T OR F: the "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's semilunar valve
T OR F: as pressure in the aorta rises due to athersclerosis, more ventricular pressure is required to open the aortic semilunar valve
T OR F: the atrira receive blood returning to the heart
T OR F: an ECG provides direct information about valve function
T OR F: the left side of the heart pumps the same volume of blood as the right
T OR F: cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle
T OR F: a heart rate less than 60 bpm is called tachycardia
T OR F: the aortic semilunar valve opens when pressure in the aorta is higher than the ventricular pressure
the lining of the heart
heart muscle
serous layer covering the heart muscle
the outermost layer of the serous pericardium
parietal pericardium
the pacemaker of the heart
SA node
found in the IV septum
AV bundle
network found in the ventricular myocardium
Purkinje fibers
the point in the conduction system of the heart where the impulse is temporarily delayed
AV node
prevents backflow into the left ventricle
aortic semilunar valve
prevents backflow into the right atrium
tricuspid valve
prevents backflow into the left atrium
mitral valve
prevents backflow into the right ventricle
pulmonary semilunar valve
av valve with three flaps
tricuspid valve
av valve with two flaps
mitral (bicuspid) valve
normal heart sounds are caused by which of the following events
closure of the heart valves
hemorrhage with a large loss of blood causes:
a lowering of blood pressure due to change in cardiac output
damage to the _____ is referred to as heart block
AV node
to auscultate the aortic semilunar valve, you would place your stethoscope
in the second intercostal space to the right of the sternum
blood within the pulmonary veins returns to the:
left atrium
blood is carried to capillaries in the myocardium by the way of:
coronary arteries
which of the following factors does not influence heart rate
skin color
small muscle masses attached to the chordae tendineae are the:
papillary muscles
if cardiac muscle is deprived of its normal blood supply, damage would primarily result from:
decreased delivery of oxygen
cardiac muscle cells are like skeletal muscle cells in that they:
the pericardial cavity:
contains a lubricating fluid called serous fluid
foramen ovale:
connects the two atria in the fetal heart
the SV for a normal resting heart is ________ ml/beat
which vessel of the heart receives blood during right ventriuclar systole
pulmonary arteries and aorta, both A and B are correct
stenosis of the mitral valve may initially cause a pressure increase in the
pulmonary circulation
which of the following is not part of the conduction system of the heart?
AV valve
which of the following is not an age-related change affecting the heart
thinning of the valve flaps
during the period of ventricular filling:
blood flows passively through the atria and the open AV valves
the tricuspid valve is closed:
when the ventricle is in systole
correct statement about the function of myocardial cells
the all-or-none law as applied to cardiac muscle means that the entire heart contracts as a unit it it does not contract at all
correct statement about the heart valves
the AV valves are supported by the chordae tendineae so that they do not blow back up into the atria during ventricular contraction
correct statement about the structure of the heart wall
the myocardium is the layer of the heart that actually contracts
the effect of endurance-type athletic training may be to lower the heart rate. this phenomenon:
is caused by hypertrophy of the heart muscle
during contraction of the heart muscle cells:
some calcium enters the cell from the extracellular space and triggers the release of larger amounts of calcium from intracellular stores