Biology A-Level
sinoatrial node
What sinoatrial node means in Biology A-Level, as defined for AQA.
Definition of sinoatrial node
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Reference: AQA
Depolarises spontaneously in the right atrium, setting the heart rate and initiating the wave of depolarisation that causes the atria to contract.
Topics that use sinoatrial node
- Control of heart rate (A-level only) (AQA A-Level)
Related terms
- bundle of His
- chemoreceptors
- medulla oblongata
- sympathetic and parasympathetic pathways
- atrioventricular delay
- myogenic contraction
- pressure receptors
- Purkyne tissue
Using sinoatrial node in the exam
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