BRAINCAKEPressure Receptors
When blood pressure is higher than normal pressure receptors within the walls of the aorta and carotid arteries detect the change and send impulses to the cardiovascular centre in the medulla.
The centre sends impulses via the vagus nerve which is part of the parasympathetic nervous system to the SAN to decrease the heart rate.
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Key terms in this lesson
- sino-atrial node
- A small group of cells in the wall of the right atrium that acts as the heart's pacemaker, generating regular electrical impulses that initiate each heartbeat.
More in Neuronal Communication
- Sino-Atrial Node
- Contraction of the Heart
- Autonomic Control of the Heart Rate
- Chemoreceptors
- Reflex Arc
- Taxes
- Kinesis
- Tropisms
All 38 lessons in Neuronal Communication · All AQA A-level Biology topics