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7 Cards in this Set
- Front
- Back
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Myogenic |
Can contract/relax w/out signals from nerves |
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Where is SAN located? |
Wall of the right atrium |
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How does SAN pass on electrical impulses? |
Sends regular waves of electrical impulse to the atrial walls Right and left atria contract at the same time Non-conducting collagen tissue (between the atria and ventricles) prevents waves of electrical activity being passed straight from atria to ventricles; instead the waves are passed from the SAN to the AVN (atrioventricular node) AVN passes waves of electrical impulse to the bundle of His, after a delay, to make sure the atria have emptied before the ventricles contract Purkyne tissue carries waves of electrical activity into muscular walls of the right and left ventricles; contract simultaneously from eh bottom up |
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Bundle of His |
Group of muscle fibres responsible for conducting waves of electrical activity between the ventricles, to the apex (bottom) of the heart. Splits into finer muscle fibres in right and left ventricle walls; Purkyne tissue |
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Cardioregulatory centre of brain |
Medulla oblongata |
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Location of baroreceptors |
Aorta Carotid arteries (in neck) |
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Location of chemoreceptors |
Aorta Carotid arteries Medulla |
