Term
| Name the two subdivisions of the efferent division of the peripheral nervous system |
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Definition
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Term
| is another name for the Autonomic nervous system? |
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Definition
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Term
| What is another name for the Somatic nervous system? |
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Definition
| Voluntary muscular system |
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Term
What are the three primary differences between the autonomic and somatic nervous
system? |
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Definition
| Autonomic nervous system is involuntary, the somatic nervous system is voluntary. The Autonomic nervous system is light myelinated or unmyelinated, conduction is much slower, the effectors of the ANS are smooth, cardiac, and glands. Somatic Nervous system heavily myelinated axons, extend from the CNS to the effector, rapid impulse conduction-skeletal muscles. |
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Term
| Name the effector organs of the Autonomic nervous system (ANS). |
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Definition
| Smooth, Cardiac, and glands |
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Term
| Name the effector organs of the Somatic nervous system (SNS). |
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Definition
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Term
What are the differences between the ANS and SNS efferent pathways?
(Degree of myelination, number of axons, speeds of conduction.) |
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Definition
| ANS- two neuron chain, preganglion neuron-lightly myelinated, postganglion neuron-extends to effector organ, unmyelinated axon-conduction much slower than SNS. SNS; heavily myelinated axons, extend from the CNS to the effector, rapid impulse conduction. |
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Term
| What are the two subdivision of the autonomic nervous system? What is the primary function of each? |
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Definition
| Parasympathetic- performs maintenance activities and conserves body energy. Sypathetic-mobilizes the body during extreme situations. |
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Term
| How does each work together? |
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Definition
| The two divisions counterbalance each other’s activity—dual innervation. |
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Term
| What are the primary roles of the parasympathetic division of the ANS? |
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Definition
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Term
| What is the neurotransmitter of the SNS? |
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Definition
| All fibers release Acetylcholine (ACh), excitatory effect-depolorization. |
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Term
| What are the neurotransmitters of the ANS Preganglion fibers? |
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Definition
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Term
| What are the neurotransmitters of the ANS Postganglion fibers? |
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Definition
| Release norepinephrine (NE). |
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Term
| Can one division override the effects of the other? When? |
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Definition
| Yes the SNS can override the effects of the PNS when an emergency arises, during exercise, fight or flight response. |
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Term
| Which division has a more local control? More diffuse effects? |
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Definition
| The parasympathetic division exerts short-lived, highly localized control. The sympathetic division exerts long lasting diffuse effects. |
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Term
Why does the sympathetic division have longer-lasting effects when compared to the
parasympathetic division? |
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Definition
| The sympathetic division exerts long lasting diffuse effects because it’s released into the blood, which causes long lasting effects. |
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