Controlling Heart rate Flashcards
1
Q
What is the role of the Vagus Nerve?
A
- Decreases the heart rate
2
Q
What is the role of the sympathetic (Accelerator) Nerve?
A
- Increases the heart rate
3
Q
Where does the cardiovascular centre of the brain found?
A
- In the medulla oblongata
4
Q
What is the role of the baro receptors?
A
- Baroreceptor detect the change in pressure and are found in the carotid artery (a swelling carotid sinus) and in the walls of the heart
5
Q
What is the role of the chemoreceptors?
A
- chemoreceptors detect the changes in the blood PH and in carbon dioxide and oxygen concentration.
6
Q
Where are the chemoreceptors found?
A
- They are found in the carotid body near to the arotid artery, aorta, the walls of the heart rate and the medulla oblongata of the brain.
7
Q
How are the sympathetic nerve and vagus nerve antagonistic to one another?
A
- Sympathetic increases heart rate and vagus nerve decrease heart rate
8
Q
What else other than nerves can influence heart rate?
A
- hormones
