chap2 EKG Word Scramble
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Question | Answer |
bundle of His(AV bundle) | conducts electrical impulese from the artia to the ventricles |
sinoatrial (SA) node (pacemaker) | initiates heart at a rate of 60-100 beats per minute with electrical impulse that causes depolarization |
atrioventricular (AV) node | delays the electrical impulse to allow for the atria to complet their contraction and ventricles to fill before the next contraction |
bundle branches | conducts impulses down both sides of the interventricular septum |
purkinje fibers (network) | distributes the electrical impulses through the right and left ventricles |
cardiac cycle | the contraction and relaxation of the heart together make up the? |
diastole | relaxation of heart, when blood fills the heart |
systole | contraction of heart, when blood leaves the heart |
semilunar valves | separate ventricles from arteries leading to lungs or body |
aortic | semilunar valve, between left ventricle and aorta |
pulmonary | semilunar valve, between rt. ventricle and pulmonary artery |
tricuspid valve | valve located between the right atrium and right ventricle |
mitral valve | atrioventricular valve between the left atrium and left ventricle |
function of the heart | pump blood to and from all tissues of body, supplies nutrients and oxygen, remove carbon dioxide and waste products |
top chambers of the heart | right and left atrium |
bottom chambers of the heart | right and left ventricle |
endocardium | inner layer, lines chambers and valves. were the purkinje fibers are located |
myocardium | middle, thickest, responsible for contraction |
epicardium | outside, thin kayer, contains coronary arteries, inner layer of pericardium |
pericardium | double- layer sac encloses heart |
interventricular septum | between right and left ventricle |
automaticity | heat has its own innate ability to initiate an electrical impulse. works on its own. |
conductivity | is the ability of the heart cells to recieve and transmit an electrical impulse. allows the electrical pulse. |
contractility | ability of heat cells to shorten inresponse to an electrical stimulus. knows how much to use. |
excitability | ability of the heart to respond to an impulse or stimulus. willing to accept stimulus. |
left side | of heart pumps oxygenated blood to the body tissue. |
right side | of the heart pumps deoxygenated blood to the lungs. |
pulmonary circulation | transportation of blood to and from lungs |
systemic circulation | transportation of blood between the heart and the rest of the body,excluding the lungs |
coronary circulation | circulation supplies blood to and from the heart through the coronary arteries and cornary sinus. |
60-100 | average heart beats approximately |
polarization | state of cellular rest in the heart |
depolarization | cellular stimulation that causes the hear to contract |
repolarization | cellular recovery that follows each contraction |
isoelectic line | straight line, represents the period when no electrical activity is occuring in the heart. |
cardiac cycle | contraction and relaxation period of the heart together make the? |
ECG waveform includes | P wave, QRS complex,T wave |
Created by:
jasra
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