Comparing The Autonomic Nervous System And Neurons

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The autonomic nervous system controls cardiac, smooth muscle and the glandular tissue. It is vital in emergency and nonemergency (rest /digest). It is responsible for nearly all voluntary muscle movements as well as for processing sensory information that arrives via external stimuli including hearing, touch, and sight. The autonomic nervous system contains 2 subdivisions which are the sympathetic and parasympathetic. The general action of the sympathetic nervous system is to mobilise the body’s first or flight response (how the body reacts to perceive danger) by preparing the body to put out energy and to protect it from effects of injury. However, the parasympathetic nervous system restores the body a state of calm. It is a slow system and…show more content…
Neurons communicate at structures called synapses. Typical neuron consists of a large number of extension called dendrites that ties neurotransmitter chemical migrating across the synaptic gaps separating neuron. There are usually like a spikes extending out from cell body. Cell body (soma) contains Nucleus, cytoplasm organelles and is the metabolic centre of the cell, Brings information to the neuron. One extension is different from all the others, and is called the axon. The purpose of the axon is to transit an electro chemical signal to other neurons. The longer axons are covered with a myelin sheath, the purpose of myelin sheath is to protect and insulate axons, and enhance their transmission of electrical impulses. At the end of the axon is terminal buttons, it releases neurotransmitters (Appendix, Fig1). Neurotransmitters play a role in the way human behave, learn and sleep and some pay in mental illness.When they are released from the neurotransmitter vesicles of the presynaptic membrane, the normal movement of molecules is directed to receptor sites situated on the postsynaptic membrane. However, in some disease, the flow of the neurotransmitter is imperfect. Neurotransmitters are: Acetylcholine and norepinephrine (excitatory neurotransmitters); dopamine, serotonin and gamma amino butyric
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