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Receptors in the Autonomic Nervous System (Adrengic (Beta (Beta1 (used in…
Receptors in the Autonomic Nervous System
Adrengic
Beta
produces CAMP to stimulate effects
Beta1
used in the heart
Beta 2
used in skeletal muscles, lungs and liver
promotes relaxation for smooth muscles
Alpha2
located on presynaptic terminal boutons, produce a decreased release of norepinephrine when activated by norepinephrine in the synaptic cleft
Alpha1
causes contraction of smooth muscles
used in the eye, skin, stomach, intesitein
Uses epinephrine and norepinephrine as neurotransmitters
Cholinegic
Musgamic - derived from poisonous mushrooms
smooth muscles and glands
depolarizes and contracts smooth muscles, secretes glands
heart
hyperpolarizes, slows down the rate of spontaneous depolarization
ACH receptors are bound to G-proteins allowing channels to open and close and activate different enzymes
Nicotinic -derived from nicotine plant
postsynaptic membrane of:
all neuromuscular junctions
some CNS pathways
all autonomic ganglia
skeletal muscle
depolarizes, produces action potential and muscle contraction
autonomic ganglia
depolarizes, causing activation for postganglionic neurons
ACH receptors are ligand-ion channels which only allow channels to open with receptor protein
uses ACH as a neurotransmitter