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Autonomic nervous system
- * Autonomic nervous system (ANS) is an involuntary branch of the nervous system
- * Consists of motor nerves that innervate smooth muscles, cardiac muscles, gland
- * Regulation heart rate, blood pressure, respiratory rate, body tempature�
- * Dividecd into two branches
- o Sympathetic division
- o Parasympathetic division
- * Both have antagonistic functions
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Sympathetic Nervous system
- * Known as "fight or flight"
- * Active during emergency situations
- * Originates from T1 to T2
- * Short preganglionic and long postganglionic neurons
- * Uses epinephrine or norepinephrine to act on the effector
- * Takes control to increase activities
- [excersise, stress, scared]
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Parasympathetic Nervous system
- * Known as "rest and digest"
- * Originates from the brain stem and S1-S4 sacral
- * Uses acetylcholine as a neurontransmitter
- * Long preganglionic and short postganglionic
- * Takes control when body is at rest to decrease activities
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Differences between somatic and autonomic nervous systems
- * Nerves
- o Somatic: one motor neuron
- o Autonomic: preganglionic and postpanglionic neurons
- * Effector organs
- o Somatic: skeletal muscles
- o Autonomic: smooth muscles, cardiac muscles, and glands
- * Neurotransmitter
- o Somatic: acetylcholine
- o Autonomatic: acetylcholine, epinephrine, or norepinephrine
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