BIO 12 Lecture Notes - Lecture 22: Autonomic Nervous System, Peripheral Nervous System, Sympathetic Nervous System
Document Summary
A single transduction mechanism are all g-protein linked receptors. Will release acetylcholine with postganglionic neuron and effector organs. Cause cation channels to open, causing depolarization. Binds to adrenergic receptors on effector organ. All organs are innervated by both sympathetic or parasympathetic nervous system. Because of this connection, if you turn on one system all organs will be effected. Preganglionic neurons originate in the thoracic and upper lumbar region of the spinal cord. Parasympathetic nervous system: is located close to the spinal cord. Autonomic ganglia are all linked together in the sympathetic chain, which. Postganglionic neurons have a very long axon to reach effector organs. Preganglionic neurons originate in the brain and lower spinal cord. Autonomic ganglia is located near the post synaptic neuron. Synapses between postganglionic neuron and effector organ. Axon swellings where neurotransmitters are synthesized and stored. Released in response to action potential in postganglionic neuron. Will diffuse over a greater area of effector organ.
