Changing Heart Rate (Neural Control) Flashcards
1
Q
What is neural control?
A
Heart rate is controlled by the medulla oblongata in the brain
2
Q
What do sympathetic nerve impulses do?
A
Increase heart rate
3
Q
What do parasympathetic nerve impulses do?
A
Decrease heart rate
4
Q
What is the role of chemoreceptors?
A
As we exercise, there is an increase in CO2 production
- More CO2 makes the blood more acidic (lowers blood PH)
- This is detected by chemoreceptors in the blood
- Chemoreceptors send an impulse to the medulla, which increases the activity of sympathetic nerves, increasing heart rate
5
Q
What is the role of baroreceptors?
A
Detect blood pressure changes
When blood pressure increases, baroreceptors are stretched, which causes heart rate to fall
6
Q
What is the role of proprioceptors?
A
Found in muscles, tendons, and joints
Detect changes in movement
Send impulses to medulla, which activate the sympathetic nervous system to increase heart rate
