regulation of heart rate Flashcards
what are neural regulators
chemoreceptors
propicatereceptors
baroreceptor
what are the different hormonal regulators
glucagon
thyroid
acetylecholine
adrenalin
noradrenaline
what are intrinsic regulators
body temp
venous return
what do the neural control factors do
key controlling regulators, provide sensory information to CCC used regulation of hr and sv
where are propioceptors located
in muscles
what happens when proprioceptors flex
- detect muscle stretching then increase tension in cells, will increase HR via cardiac accelerator nerve
where are chemoreceptors located
blood vessel- aorta and carotid artery
what happens when chemoreceptors flex
detect change in blood ph, o2 and co2
all stimulate changes in hr via cardiac accelerator nerve
where are baroreceptors located
in blood vessels aorta and carotid arteries
what happens when baroreceptors contract
detect change in blood pressure, if it is high acetylcholine is released by parasympathetic nerve which will decrease hr
what do noradrenaline, and adrenaline do
increase HR, increase strength of ventricular contraction which increases sv
what does acethylcholine do
slows hr
what does thyroid hormone and glucagon do
increase HR
what does increased glucagon levels do
assist the breakdown on glycogen to release glucose into cirularatory system to fuel muscle contractions
what is starlings law of the heart
volume of blood which enters the heart must equal the volume of blood which leaves the heart
venous return= cardiac output
