• Ca2+ influx , [Ca2+ ]i , contractility
Cardiac effect of parasympathetic stimulation
Interaction of sympathetic and parasympathetic nerves
Predominance of autonomic nerves
sympathetic constrictor nerve, vagus nerve • Effector: heart & blood vessels
Baroreceptor neurons function as sensors in the homeostatic maintenance of MAP by constantly monitoring pressure in the aortic arch and carotid sinuses.
Cardiovascular Center
A collection of functionally similar neurons that help to regulate HR, SV, and blood vessel tone
Vasomotor center
Located bilaterally mainly in the reticular substance of the medulla and of the lower third of the pons
180 mmHg ➢Receptors within the aortic arch are less
sensitive than the carotid sinus receptors