Neural Control

what does the sympathetic nervous system do

stimulates heart to beat faster

what does the parasympathetic nervous system do

it returns the heart beat to resting level

what is the nervous system made up of

the central nervous system (CNS) - brain and spinal cord

and the peripheral nervous system - nerve cells

where is the cardiac control centre (CCC) located

in the medulla oblongata

what stimulates the CCC

chemoreceptors, baroreceptors and proprioceptors

what do chemoreceptors do and where are they found

• increase in CO2 or blood acidity → increase HR

• found in the cartoid arteries and aortic arch

what do baroreceptors do and where are they found

• respond to stretching of arterial walls caused by changes in blood pressure

• increase in blood pressure → decrease in HR

• decrease in blood pressure → increase in HR

• found in aortic arch, cartoid sinus, heart and pulmonary vessels

what do proprioceptors do and where are they found

• they detect changes in muscle movement

• increase in movement → signal to medulla → sympathetic nervous system → SAN to increase HR

• increase in muscle movement → increase HR

• found in muscles, tendons, joints