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17 Cards in this Set
- Front
- Back
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What is the autonomic nervous system responsible for?
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unconscious control of the visceral organs
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Where does the autonomic NS begin?
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at the hypothalamus, and has 2 motor neurons to the target
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Where does the preganglionic neuron synapse with the postganglionic neuron?
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at a ganglion
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What is the target of the autonomic NS?
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cardiac muscle tissue
smooth muscle tissue glands |
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What are the neurotransmitters for the auto NS?
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Ach or NE,E
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Is the auto NS excitatory or inhibitory?
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can be both
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What are the 2 components of the auto NS?
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Sympathetic-fight or flight
Parasympathetic-resting & digesting |
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Symptoms of the sympathetic NS...
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increased HR
increased blood flow increased respirations decreased digestion vasoconstriction of blood vessels |
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Syptoms of the parasympathetic NS...
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decreased HR
decreased blood flow decreased respirations increased digestion vasodilation of blood vessels |
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Can both para and sympathetic systems function at the same time?
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no
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Why can the para and sympathetic systems not function together?
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body cannot rest and digest during fight or flight...and vice versa
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For the sympathetic NS the preganglionic neuron releases what....and has what receptors?
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releases Ach and postganglionic neuron has Ach receptors which are always excitatory
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For the sympathetic NS the postganglionic nearon releases....
and has what receptors? |
releases NE,E and target organ has alpha and beta receptors which can be excitatory or inhibitory
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For the parasympathetic NS the preganglionic neuron releases...
and has what receptors? |
releases Ach and postganglionic neuron has nicotinic ACh receptors which are always excitatory
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For the parasympathetic NS the postganglionic neuron releases....
and has what receptors? |
releases ACh and the target organ has muscarinic ACh receptors which can be excitatory or inhibitory
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What is dual innervation?
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target is innervated by both para and sympathetic NS, have opposite effects on the target
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What is autonomic tone?
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target innervated by the sympathetic NS only, amount of stimulation determines the overall effect. Increased stimulation=vasoconstriction and decreased stimulation=vasodilation
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