Term
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Definition
| nerve impulse that causes the potential of the cell to rapidly rise and fall |
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Term
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Definition
| the force or pressure that opposes the blood being pushed out the heart |
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Term
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Definition
| when the atria become less negative in potential |
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Term
| atrioventricular (AV) bundle |
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Definition
| bundle of muscle fibers that are specialized to regulate the heartbeat by conducting impulses from the right atrium to the ventricles. |
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Term
| atrioventricular (AV) node |
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Definition
| slows the signal from the SA node down and regulates it in order to prevent atrial fibrillation, and then sends the electrical impulses from the atria to the ventricles |
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Term
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Definition
| the pressure of the blood within the circulatory system |
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Term
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Definition
| continuation of the AV bundle, transmits electrical impulses in the ventricles of the heart |
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Term
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Definition
| period of time from the generation of one heartbeat to the beginning of the next heartbeat |
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Term
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Definition
| amount of blood that is pumped by the heart per minute, product of heart rate and stroke volume |
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Term
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Definition
| the difference between the heart's rate for pumping blood at a particular time and its maximum capacity for pumping blood |
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Term
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Definition
| self-contraction of muscles, cardiac inotropy |
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Term
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Definition
| the intercellular junctions between epithelia and cardiac muscle |
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Term
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Definition
| the part of the cardiac cycle in which the heart refills with blood after contraction |
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Term
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Definition
| amount of pressure in the arteries when the heart is between beats |
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Term
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Definition
| EKG, tests the electrical activity of the heart |
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Term
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Definition
| intracellular connections between cell-types |
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Term
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Definition
| number of heart beats per minute |
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Term
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Definition
| the sounds resulting from the opening and closing of the valves within the heart |
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Term
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Definition
| at the junction of two myocardial cells, site of intercellular ion passage and electrical impulses |
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Term
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Definition
| skeletal muscles that help move the blood pumped by the blood along |
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Term
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Definition
| middle muscular layer of the heart |
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Term
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Definition
| wave in an EKG reading that shows atrial depolarization, precedes QRS complex |
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Term
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Definition
| in the SA node, controls heart rate |
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Term
| parasympathetic innervation |
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Definition
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Term
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Definition
| pressure in the ventricles after diastole |
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Term
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Definition
| waves in an EKG reading that show ventricular depolarization |
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Term
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Definition
| pumps gasses, changes pressures in the abdomen, causes veins to squeeze |
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Term
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Definition
| natural pacemaker, generates electrical signals, controls heart rate |
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Term
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Definition
| amount of blood pumped by the left ventricle in the heart in by one contraction |
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Term
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Definition
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Term
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Definition
| part of the cardiac cycle in which the heart muscles contract and pump the blood from the chambers to the arteries |
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Term
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Definition
| amount of pressure in the arteries while the heart is contracting |
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Term
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Definition
| wave in an EKG reading that shows the repolarization of the arteries |
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Term
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Definition
| tenth cranial nerve, slows the heart rate |
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Term
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Definition
| rate of the blood flow from the body back to the heart |
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Term
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Definition
| prevent blood from flowing backwards, into from where it was just pumped |
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Term
| ventricular depolarization |
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Definition
| when the ventricles become less negative in potential |
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Term
| ventricular repolarization |
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Definition
| when the ventricles become more negative in potential |
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