Card Set Information
blood vessels that transport blood away from the heart
the smallest arteries that transport blood from larger arteries to the capillaries.
the specialized mass of conducting cells in the heart located at the atrioventricular junction
atrioventricular (AV) node
stretch receptor located within the cardiovascular system that senses changes in blood pressure
a resting heart rate lower than 60 bpm
the smallest vessels transporting blood from the heart to the tissues and the actual sites of exchange between the blood and tissue
the period that includes all events between two consecutive heartbeats
the volume of blood pumped out by the heart per minute. Q = HR X stroke volume.
cardiac output (Q)
a sensory organ capable of reacting to a chemical stimulus
the lowest arterial pressure, resulting from ventricular diastole (the resting phase)
diastolic blood pressure
the fraction of blood pumped out of the left ventricle with each contraction, determined by divind stroke volume by end-diastolic volume and expressed as a percentage
a recording of the heart's electrical activity
the volume of blood remaining in the left ventricle at the end of diastole just before contraction
end diastolic volume (EDV)
the volume of blood remaining in the left ventricle at the end of systole, just after contraction
end systolic volume (ESV)
redistribution of blood at the system or body level through neural mechanisms
extrinsic neural control
the percentage of cells or formed elements in the total blood volume. more than 99% of the cells or formed elements are red blood cells
increased red blood cell concentration by increased production of cells.
the iron-containing pigment in red blood cells that binds oxygen
the average pressure exerted by the blood as it travels through the arteries. it is estimated as follows: MAP = DBP + (0.333 X (SBP - DBP)).
mean arterial pressure (MAP)
an end organ that responds to changes in mechanical stress, such as stretch, compression, or distension
the muscle of the heart
a double-layered outer covering of the heart
a common cardiac arrhythmia that results in the feeling of skipped or extra beats caused by impulses originating outside the SA node
premature ventricular contraction (PVC)
the terminal branches if the AV bundle that transmit impulses through the ventricles six times faster than through the rest of the cardiac conduction system
a group of specialized myocardial cells, located in the wall of the right atrium, that control the heart's rate of contraction; the pacemaker of the heart
sinoatrial (SA) node
the amount of blood ejected from the left ventricle during contraction; the difference between the end-diastolic volume and the end-systolic volume
stroke volume (SV)
the greatest arterial blood pressure, resulting from systole (the contracting phase of the heart)
systolic blood pressure
a resting heart rate greater than 100 bpm
the constriction or narrowing of blood vessels
the dilation or widening of blood vessels
blood vessels that transport blood back to the heart
a serious cardiac arrhythmia in which the contraction of the ventricular tissue is uncoordinated, affecting the heart's ability to pump blood
a serious cardiac arrhythmia consistring of three or more consecutive premature ventricular contractions.
small vessels that transport blood from the capillaries to the veins and then back to the heart.