ANS Basics Flashcards
Cholinergic Neurons
Release Ach
Adrenergic Neurons
Release NE
AcH Removal from Synapse
Degradation/metabolism
NE removal from synapse
Diffusion
Re-uptake and metabolism
Presynaptic Sympathetic Neurotransmitter
Ach
Presynaptic Parasympathetic Neurotransmitter
Ach
Postsynaptic Sympathetic Neurotransmitter
Usually NE
Postsynaptic Parasympathetic Neurotransmitter
Ach
Postsynaptic sympathetic receptors
Nicotinic (Nn) Ach receptors
Postsynaptic parasympathetic receptors
Nicotinic (Nn) Ach receptors
Target organ parasympathetic receptors
Muscarinic Ach receptors
Target organ sympathetic receptors
Alpha or beta adrenergic receptors
Organs receiving only sympathetic innervation
Skin, sweat glands, smooth muscle of blood vessels
Sympathetic innervation of the eye
ciliary muscle relaxes, pupils dilate
Parasympathetic innervation of the eye
Ciliary muscle contracts, pupils constrict CN III