Heart Rate Regulation Flashcards
What are 3 types of control
Neural
Intrinsic
Hormonal
What are the 3 receptors of neural control
Chemoreceptors
Baroreceptors
Proprioceptors
Chemoreceptors
Detect an increase in carbon dioxide and a decrease in oxygen
Baroreceptors
Detect an increase in blood pressure
Proprioceptors
Detect an increase in muscle movement
Information from receptors gets sent to where?
Cardiac control centre (ccc)- controlled by the autonomic nervous system
How does info from the ccc increases heart rate?
Info sent to sympathetic nervous system
Stimulates accelerator nerve
Increases the firing rate of the SA node
Increases heart rate
Where does info from receptors go to after ccc in recovery?
Info sent to parasympathetic nervous system
Stimulates vagus nerve
Intrinsic control detectors
Increase in temperature
Increase in venous return
Increase in temperature means
Increases speed of nerve transmission
Increases blood viscosity
Increase in venous return means
More blood returns back to the right atrium
Right atrium stretch causes SA node to increase firing range
Increases firing range of SA node in intrinsic control =
Blood is forced down into the ventricles
Increases ventricle stretch/ contraction force
Increases stroke volume/ cardiac output
Hormonal control
Adrenaline secreted by the adrenal gland
Send to to sympathetic nervous system
Increases firing rate if SA node which increases heart rate
