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The Heart Study G

Things to know about the Heart and Heart disease

QuestionAnswer
The heart's pointed inferior portion is the apex
The layer of the heart wall that pumps blood is the myocardium
The heartbeat is initiated by electrical impulses from the sinoatrial node
Lack of blood to a tissue due to blocked arteries is called ischemia
Pain caused lack of blood to heart muscle is called angina
Receives blood low in oxygen from the body Right atrium
Receives blood high in oxygen from the lungs Left atrium
Sends blood low in oxygen to the lungs Right ventricle
Sends blood high in oxygen to the body Left ventricle
Which structural characteristic promotes rapid transfer of electrical signals between cardiac muscle cells? intercalated disks between the cells
What separates the upper chambers of the heart from each other? interatrial septum
Which term describes one complete sequence of heart contraction and relaxation? cardiac cycle
Cardiac output is the product of which factors? stroke volume and heart rate
Which medication reduces cardiac output by lowering sympathetic responses? beta-adrenergic blocking agent
Which variation in heart rate can be due to changes in the rate and dept of breathing? sinus arrhythmia
Created by: Jessica Venyke
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