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Neurotransmitters

Neurotransmitters

Nervous System 101

The nervous system is divided into two parts:

(1)CNS - brain and spinal cord

(2)PNS – cranial and spinal nerves.

Sensory (afferent) Neurons - transmits impulses TO the CNS

Motor (efferent) Neuron System - transmits impulses FROM the CNS to effectors.

a) Somatic Nervous System directs contraction of skeletal muscles

b) Autonomic Nervous System controls activities of organs and various involuntary muscles, such as cardiac and smooth muscles. Has 2 systems that generally target thesame organs but are antagonistic.

i. Parasympathetic Nervous System “Rest and Digest”or “Brake” activates tranquil functions. E.g. secretion of saliva or digestive enzymes.

ii. Sympathetic Nervous System “Fight or Flight”or “Accelerator –    prepare body for action. E.g. increasing heart rate, increasing sugar release from liver to blood.

Neurotransmitter Related Links

Neurotransmitter

Related Links

ABOUT

About Neurotransmitters

- Nervous System 101

SPECIFIC

Neurotransmitter Chart

- NITRIC OXIDE

- MELATONIN

- Some Neurotransmitters of Special Mention