Autonomic Nervous System

Autonomic Nervous System - Structure Neurons Chain...

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Autonomic Nervous System
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Somatic/Autonomic NS Effectors Efferent pathways and ganglia Neurotransmitter effects Cell body of the first neuron, the preganglionic neuron, resides in the brain or spinal cord. Its axon, the preganglionic axon, synapses with the second motor neuron, the ganglionic neuron, in an autonomic ganglion outside the CNS. The axon of the ganglionic neuron, called the postganglionic axon, extends to the effector organ.
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Neurotransmitters and Receptors Neurotransmitters Receptors Cholinergic- nerves that are stimulated by acetylcholine Adrenergic- nerves that are stimulated by norepinephrine
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Parasympathetic NS Structure- long preganglionic neurons, short post ganglionic Neurons Ganglia Neurotransmitter Function SLUD S- salivation L- lacrimation U- urination D- digestion and defecation
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Sympathetic NS
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Unformatted text preview: Structure Neurons Chain (paravertebral) ganglia Collateral ganglia Adrenal medulla- doesnt synapse anywhere Function 4 Es Exercise Excitement Emergency Embarrassment Interactions of ANS Sympathetic and parasympathetic tone Antagonistic and cooperative effects Sympathetic division uniqueness Local versus diffuse effects Autonomic Control Brain stem and spinal cord- dilation and contraction of eyeball, heart rate, lacrimal gland= tears Reticular foramen exerts most direct influence over autonomic functions Hypothalamic control Main integration center for ANS Coordinate heart activity, blood pressure, body temp., water balance, and endocrine activity Also rage, pleasure, sex, thirst, and hunger Cortical controls...
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Autonomic Nervous System - Structure Neurons Chain...

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