Cardiac control centre Flashcards
1
Q
Where is the cardiac control centre located?
A
Medulla oblongata
2
Q
What two systems control heart rate in the medulla oblongata?
A
Sympathetic (increase) and parasympathetic (decrease).
3
Q
What are the 3 receptors in the cardiac control centre?
A
1.Chemoreceptors
2.Baroreceptors
3.Proprioceptors
Also hormonal control
4
Q
What do baroreceptors do?
A
They detect a change in blood pressure
5
Q
What do chemoreceptors do?
A
They detect a rise in carbon dioxide (increase in acidity)
6
Q
What do proprioceptors do?
A
They detect an increase in muscular movement.
7
Q
What is the pattern for each receptor?
A
- Exercise begins
- Baro/chemo/proprio - receptors detect the change
- Info sent to medulla oblongata
- Stimulates sympathetic nervous system
- Increased impulses send to the sinoatrial node.
- Heart rate increases to meet demands of exercise
