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Cards In This Set
| Front | Back |
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Role of the sympathetic division
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Mobilizes the body during activity; is the "fight-or-flight" system.
Promotes adjustments during exercise, or when threatened. -Blood flow is shunted to skeletal muscles and heart -Bronchioles dilate -Liver releases glucose |
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Preganglionic neurons are in spinal cord segments ______
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T1- L2
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Sympathetic nerurons produce the _______ _____ of the spinal cord
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Lateral horns
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Preganglionic fibers pass through the _________ and enter ________.
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White rami and enter sympathetic trunk (paravertebral) ganglia
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There are __ paravertebral ganglia in the sympathetic trunk (chain).
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23
-3 cervical -11 thoracic -4 lumbar -4 sacral -1 coccygeal |
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Visceral pain afferents travel along the same pathway as _______.
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Somatic pain fibers
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Pain stimuli arising in the viscera are preceived as ____ in origin.
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Somatic
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Cholinergic fibers release the neurotransmitter ____.
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ACh
-All ANS preganglionic axons -All parasympathetic postganglionic axons |
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Adrenergic fibers release the neurotransmitter ____.
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NE
-Most sympathetic postganglionic axons. -Exceptions: sympathetic postganglionic fibers secrete ACh at sweat glands and some blood vessels in skeletal muscles. |
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Type of receptors for ACh?
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Cholinergic receptors
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Type of receptors for NE?
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Adrenergic receptors
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What two types of receptors bind ACh?
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1. Nicotinic
2. Muscarinic |
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Nicotinic Receptors are found on:
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Motor end plates of skeletal muscle cells
All ganglionic neurons Hormone-producing cells of the adrenal medulla. |
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Effect of ACh at nicotinic receptors is always ______.
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Stimulatory
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Muscarinic Receptors are found on:
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All effector cells stimulated by postganglionic cholinergic fibers
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