cardiovascular sensory regulation & control Flashcards
how is blood pressure and blood flow controlled
through interconnected neg feedback systems that work by adjusting HR, SV, systemic vascular resistance and blood volume
do all feedback systems act at the same speed
no some act faster or slower
some are also shorter or longer than others
where is the cardiovascular centre found
in the medulla oblongata
what does the cardiovascular centre do
regulate HR and SV
controls neural, hormonal and local neg feedback systems that regulate blood pressure and blood flow to specific tissues
what do groups of neurones in the CV centre do
regulate HR, contractility of ventricles and blood vessel diameter
where are cardio-stimulatory and cardio-inhibitory centres found
in the CV centre
what does vasomotor centre do
control blood vessel diameter
receives input from both higher brain region and sensory receptors
3 main types of sensory receptors
proprioceptors
baroreceptors
chemoreceptors
what do proprioceptors do
monitor movements of joints and muscles to provide input during physical activity
what do baroreceptors do
monitor pressure changes and stretch in blood vessel walls
what do chemoreceptors do
monitor concentration of various chemicals in the blood
what does the output from CV travel along
neurons of ANS
what does the sympathetic (stimulatory) system oppose
the parasympathetic system (inhibitory)
where are baroreceptors found
found internal carotid arteries and other large arteries in neck and chest
what does the carotid sinus reflex do
helps regulate blood pressure in brain
