Review Autonomic Nervous System
2 neuron system
Preganglionic neuron in spinal cord and postganglionic and autonomic ganglion some where
Know neurotransmitters and receptors involved.
Brief overview to autonomic neurotransmitter receptor classification
A. Cholinergic (acetylcholine is the neurotransmitter)
1. Nicotinic receptors - ionotropic: skeletal muscle, autonomic ganglia, CNS
2. Muscarinic receptors - metabotropic: smooth muscle, cardiac muscle, glands, CNS (cognition & memory). Responsible for vagal tone of the heart
B. Adrenergic (norepinephrine is the primary neurotransmitter)
1. Alpha () adrenergic receptors - metabotropic: alpha1 (postsynaptic)--blood vessels, many organs and alpha 2 (presynaptic in CNS)
2. Beta () adrenergic receptors - metabotropic: Beta 1: heart and Beta 2: bronchiole, blood vessels
C. Peptidergic (numerous) - metabotropic. Don't worry about it--mostly in gut!