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28 Cards in this Set
- Front
- Back
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Somatic System |
receptors of somatic system sense pain, thermal, tactile and propreoception relay to cerebral cortex for a voluntary skeletal muscle response. Uses ACh |
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Autonomic System |
uses interoceptors and other body senses. Responds using involuntary control. Para and Sympathetic divisions |
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Interoceptors |
Sensory neurons located in blood and visceral organs |
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Parasympathetic |
Rest and Digest-autonomic division |
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Sympathetic |
Fight or flight-autonomic division |
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Autonomic Ganglion |
Located outside the CNS and is the center of the two motor neuron synapse relaying out to the visceral organs |
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preganglionic neuron |
always releases ACh to excite the second neuron |
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post ganglionic neuron |
releases ACh or Norepinphrine for muscle contraction or relaxation |
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Dual innervation |
Most organs receive info from both the para and sympathetic nervous divisions |
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Structure of Sympathetic divison |
Preganglionic nerve originates in the gray horn and exit anterior of spinal nerves T1-T3. |
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Sympathetic Trunk |
Vertebral chain ganglia. Nerves have short preganglionic fibers and long post ganglionic fibers |
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Structure of Parasympatheic Division |
Some Preganglionic fibers originate in spinal cord and exit in cranial nerves or some originate in lower brain stem and exit through S2-S4 |
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terminal ganglia |
post ganglionic nerves located close to the target tissue long preganglionic fibers and short post ganglionic fibers. Parasympathetic |
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Plexus |
tangles of nerves operating the autonomic nervous system |
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Pulmonary plexus |
supplies bronchial tree |
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Solar (Celiac) plexus |
supplies spleen, pancreas and liver |
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Mesenteric Plexus |
supplies intestines |
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Renal Plexus |
Supplies kidneys and ureters |
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Cholinergic |
neurons that release ACh |
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Types of Cholinergic Nerons |
ALL sympathetic and para sympathetic pre ganglionic neurons Sympathetic that innervate sweat gland and ALL post sympathetic post ganglionic that innervate glands, cardiac and smooth muscles |
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Nicotinic |
mimics ACh found in dendrites and cell bodies of ALL post synaptic neurons and plasma membranes of skeletal muscles at neuron muscular junction. Excitatitory |
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Muscarinic |
Mimics ACh receptors in cardiac, smooth muscles and glands Excitatory OR Inhibited |
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Adrenegic |
release Norepinephrine or Epinephrine. ALL post synaptic sympathetic that do not synapse with sweat glands |
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Alpha 1 and Beta 1 receptors |
respond excited in post synaptic cells |
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Alpha 2 and Beta 2 |
respond inhibition in post synaptic cells
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MAO monoamine oxidase |
enzymes that break down neurotransmitters. |
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MAO blocker |
block this enzyme allowing for long neurotransmitter excitation. Given to those with depression |
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Adrenal Medulla |
is part of the adrenal gland. It is located at the center of the gland, being surrounded by the adrenal cortex. It is the innermost part of the adrenal gland, consisting of cells that secrete epinephrine (adrenaline), norepinephrine (noradrenaline), and a small amount of dopamine in response to stimulation by sympathetic preganglionic neurons.
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