Extract from notes: "- Medulla oblongata is responsible for controlling heart rate; two centres within it that are linked to the SAN by motor neurones
One centre increases heart rate: sends impulses through sympathetic nervous system transmitted by the accelerator nerve
One centre decreases heart rate: sends impulses through parasympathetic nervous system transmitted by the vagus nerve
Which centre is stimulated depends of info received by receptors in the blood vessels
- BARORECEPTORS (pressure receptors) – detect changes in blood pressure; present in the aorta, vena cava and carotid arteries
E.g. blood pressure low heart rate needs to increase to prevent fainting
- CHEMORECEPTORS (chemical receptor) – detect changes in the levels of CO2; located in the aorta, carotid artery and the medulla "
One centre increases heart rate: sends impulses through sympathetic nervous system transmitted by the accelerator nerve
One centre decreases heart rate: sends impulses through parasympathetic nervous system transmitted by the vagus nerve
Which centre is stimulated depends of info received by receptors in the blood vessels
- BARORECEPTORS (pressure receptors) – detect changes in blood pressure; present in the aorta, vena cava and carotid arteries
E.g. blood pressure low heart rate needs to increase to prevent fainting
- CHEMORECEPTORS (chemical receptor) – detect changes in the levels of CO2; located in the aorta, carotid artery and the medulla "
Get this resource as part of a bundle and save up to 26%
A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.
Something went wrong, please try again later.
This resource hasn't been reviewed yet
To ensure quality for our reviews, only customers who have purchased this resource can review it
Report this resourceto let us know if it violates our terms and conditions.
Our customer service team will review your report and will be in touch.
£2.50