Module 8: Neural Control of Blood Pressure

Baroreflex

an automatic, negative feedback response to changes in blood pressure

Chemoreflex

an automatic response to changes in blood chemistry

Especially pH, and concentrations of O2 and CO2

beta-adrenergic receptors

Receptors located on postsynaptic cells that are stimulated by specific autonomic nerve fibers. Beta1-adrenergic receptors are located primarily in the heart, whereas beta2-adrenergic receptors are located in the smooth muscle fibers of the bronchioles, arterioles, and visceral organs.

alpha-adrenergic receptors

Receptors located on postsynaptic cells that are stimulated by specific autonomic nerve fibers. Found in smooth muscle of arterioles, bladder; result in constriction when activated

Acetylcholine

Neurotransmitter secreted by the parasympathetic nervous system. Leads to a decrease in heart rate.