Flashcards
Biology 3.1.2 Control of the cardiac cycle
Cards in this deck (8)
- 1The cardiac muscle automatically contracts and relaxes without nerve stimulation, so it is described as...?Myogenic
- 2What initiates the cardiac cycle?Sino-atrial node (SAN)
- 3Where is the SAN located?Walls of right atrium
- 4What prevents the electrical wave passing to the ventricles as well the atria?A band of collagen fibres between the aorta and ventricles
- 5How does the electrical impulse get to the ventricles?Through the AVN but it delays the wave so that blood can get into the ventricles before they contract
- 6What is the pathway of the electrical impulse?SAN
AVN
Purkyne fibres
Bundle of his - 7What do the purkyne fibres do?Conducts electrical impulses up and outwards through the ventricle walls
- 8What factors can effect heart rate?Age
Fitness level
Medical conditions
Diet
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- User has deleted their subject information Flashcards on Biology 3.1.2 Control of the cardiac cycle, created by Deleted user on 22/04/2019.
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- Deleted user · Apr 2019
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- Apr 22, 2019
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- Created by Sam Gunnell · Apr 20, 2019
- Copied by Sam Gunnell · Apr 22, 2019
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