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47 terms

Ex33-35

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diastole
Refers to ventricular relaxation.
cardiac cycle
A graph illustrating the pressure and volume changes during one heartbeat.
75
Average heart beats per minute.
murmurs
Abnormal heart sounds which can indicate valvular problems.
pulse
Refers to the alternating surges of pressure in an artery that occur with each contraction and relaxation of the left ventricle.
radial
The pulse is most often taken at the lateral aspect of the wrist, above the thumb, compressing the _____ artery.
sphygmomanometer
Device used to measure blood pressure.
90
In reporting a blood pressure of 120/90, which number represents the diastolic pressure?
sounds of Korotkoff
The _______ are characteristic sounds that indicate the resumption of blood flow to the artery being occluded when taking blood pressure.
systole
Refers to ventricular contraction.
dicrotic notch
Pressure fluctuation resulting from the closure of the aortic semilunar valves.
0.8 second
The length of the cardiac cycle.
atrial contraction
The first 0.1 second of the cardiac cycle.
atrial relaxation and ventricular contraction
Follows atrial contraction in the cardiac cycle and lasts 0.3 second.
ventricular relaxation
Follows atrial relaxation and ventricular contraction in the cardiac cycle and lasts 0.4 second.
the alternate contraction and relaxation of the myocardium and the opening and closing of valves
What are two different types of phenomena that control the movement of blood through the heart?
turbulent blood flow
Sounds heard in the cardiovascular system result from what?
2
How many distinct sounds are heard during each cardiac cycle?
lub, dup
Heart sounds described in monosyllables.
lub
Referred to as S1 and is associated with closure of the AV valves at the beginning of ventricular systole.
dup
Referred to as S2 and occurs as the semilunar valves close and corresponds to the end of the systole.
mitral
Which valve closes first, the mitral valve or the tricuspid valve?
apex
Where would you place a stethoscope in order to hear the mitral valve more clearly?
5th
In which intercostal space is the mitral valve located?
left clavicle
What is the apex in line with the middle of?
right sternal margin over fifth intercostal space
Where would you place a stethoscope in order to hear the bicuspid valve more clearly?
pulmonary semilunar valve
Which valve closes first, the aortic semilunar valve or the pulmonary semilunar valve?
second intercostal space, right of the sternum
Where would you place a stethoscope in order to hear the aortic valve more clearly?
second intercostal space, left of the sternum
Where would you place a stethoscope in order to hear the pulmonary valve more clearly?
pulse pressure
The difference between systolic and diastolic pressure is called _______.
apical pulse
The counting of heartbeats.
pulse deficit
Any large differences between pulse values. May indicate cardiac impairment, low cardiac output, or abnormal heart rhythms.
blood pressure
The pressure the blood exerts against any unit area of the blood vessel walls. Generally measured in the arteries.
systolic pressure
The pressure in the arteries at the peak of ventricular ejection.
diastolic pressure
The pressure in the arteries at the peak of ventricular relaxation.
cold pressor test
A blood pressure test in which one hand is immersed in unpleasantly (even painfully) cold water.
collateral vessels
An organ can remain viable even though its main arterial supply is occluded, as long as these are still functional.
dermatographism
A condition in which the direct line of stimulation swells.
lymph
Excess tissue fluid that has leaks out of capillaries.
lymph nodes
Serve as filters for the lymphatic system and occur at various points along the lymphatic vessels.
specificity
Three characteristics of the immune response are the ability to distinguish self from non self, memory and
T cells
Differentiate in the thymus.
cellular
T cells mediate ______ immunity because they destroy cells infected with viruses and certain bacteria and parasites.
(1) transports tissue fluid, (2) protects the body by removing foreign material
Two functions of the lymphatic system
lymphatic capillaries
Picks up leaked fluid and carries it to lymphatic collecting vessels and trunks.
right lymphatic duct
Drains lymph from the right upper extremity, head, and thorax.
thoracic duct
Receives lymph from the rest of the body.