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10 Cards in this Set
- Front
- Back
Autonomic Nervous System
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- aka: involuntary nervous system
- anatomically is a motor (efferent system) - regulates and coordinates vital internal functions: circulation, respiration, digestion, metabolism, body temp., excretion, ect |
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ANS (involuntary)provides motor innervation to:
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- heart
- smooth muscle: blood vessels, eyes, lungs, gastrointestinal tract, urinary bladder, uterus, etc. - exocrine glands: sweat glands, lacrimal glands, pancreatic glands, gastrointestinal (digestive glands), etc. |
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Autonomic Nervous System
|
- aka: involuntary nervous system
- anatomically is a motor (efferent system) - regulates and coordinates vital internal functions: circulation, respiration, digestion, metabolism, body temp., excretion, ect - internal homeostasis - keep the internal environment operating at a steady, optimal level |
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ANS (involuntary) provides motor innervation to:
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- heart
- smooth muscle: blood vessels, eyes, lungs, gastrointestinal tract, urinary bladder, uterus, etc. - exocrine glands: sweat glands, lacrimal glands, pancreatic glands, gastrointestinal (digestive glands), etc. |
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two divisions of the ANS
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- have diametrically opposite effects on most internal organs
- PARASYMPATHETIC DIVISION: conserving and restoring body energy; regulation of metabolism/digestion, waste elimination, etc. -"rest and digest" function - SYMPATHETIC DIVISION: Expenditure rather than conservation of erngy -"fight or flight" - for emergency situations |
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Autonomic Motor Nerves
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- Involuntary
- Innervate the heart, smooth muscle, and exocrine glands - Two neuron chain - First order neuron = preganglionic neuron - Second order neuron = postganglionic neuron - Effector organ |
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First order neuron
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- preganglionic neuron
- cell body lies within the CNS |
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Second order neuron
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- postganglionic neuron
- cell body lies within the peripheral ganglion |
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Effector organ
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organ innervated by an autonomic postglanglionic nerve
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Somatic Motor Nerves
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- Voluntary
- Innervate skeletal muscle - Single neuronal path (no innervating ganglion) |