Control of the Heart
- Created by: _chantellerowe
- Created on: 24-01-16 14:49
View mindmap
- Control of the Heart
- Neural Control
- The CCC receives info. from the sensory receptors
- The Mechanoreceptors and the Proprioceptors detect a change in the shape and size of muscles and tendons
- Info in sent to CCC and there is an increase in CO2 and lactic acid from exercise.
- The Chemoreceptors detect a change in the pH of the blood
- This causes the pH to fall and HR to increase.
- Info in sent to CCC and there is an increase in CO2 and lactic acid from exercise.
- The Chemoreceptors detect a change in the pH of the blood
- The Baroreceptors are stretch receptors in the walls of the aorta, vena cava and carotid arteries
- Detecting an increase in blood flow and therefore blood pressure
- Causes HR to increase
- Detecting an increase in blood flow and therefore blood pressure
- The Mechanoreceptors and the Proprioceptors detect a change in the shape and size of muscles and tendons
- Strenuous Exercise
- DURING - the CCC responds to info from the sympathetic nervous system
- Causes an increase in HR and Stroke Volume
- AFTER - the parasympathetic nervous system returns HR to resting
- DURING - the CCC responds to info from the sympathetic nervous system
- The CCC receives info. from the sensory receptors
- Hormonal Control
- Anticipatory rise in HR due to adrenaline
- The adrenaline is released by the adrenal gland into the blood during times of stress
- The adrenaline prepares the body for exercise by increasing HR and the strength of ventricular contraction
- Adrenaline and Noradrenaline increase HR and respiration rate
- Constricts blood vessels --> increasing blood pressure, helping blood reach the active muscles
- Increase blood glucose levels, by stimulating the breakdown of glycogen in the liver which fuels muscular contraction
- Adrenaline and Noradrenaline increase HR and respiration rate
- Anticipatory rise in HR due to adrenaline
- Central to regulation of the heart is the Cardiac Control Centre, it has two main components
- The Sympathetic Nervous System increases HR
- The Parasympathetic Nervous System decreases HR
- Allowing it to return to resting hr
- Neural Control
- DURING - the CCC responds to info from the sympathetic nervous system
- Causes an increase in HR and Stroke Volume
Comments
No comments have yet been made