NERVOUS SYSTEM

A. NERVOUS SYSTEM

The nervous system is a system of coordination (setting body) that conduct nerve impulses to the central nervous system, the processing of nerve impulses and orders to give response to stimuli.

B. STRUCTURE AND KINDS OF THE NERVE CELL

The nervous system is composed of cells with less specific functions, ie nerve cells called neurons. Part - the part of the nerve cells?



the parts on the neuron:
> Dendrite : serve receive and deliver stimuli to the cell body
> Cell body : manage all activities in cell
> Myelin sheath : protective axons
> Schwann cell : the cells making up the myelin sheath
> Node of Ranvier : accelerate the course of excitatory
> Axon : continued stimuli from the nerve cell body to other cells
> Axon terminals : liaison degan other neuronal cells

Meanwhile, based on its function, nerve cells can be divided into three:
> Sensory neurons : conduct stimuli from receptors to the central nervous
> Motor neurons : deliver a response from the nerve center to the effector
> Neurons connector : connect sensory neurons with motor neurons in the central nervous





C. SCHEME OF EXCITATORY

Reflex

Excitatory sensory nerve >> spinal cord motor nerve >> muscle / hormones>>reflex >> ordinary motion


Excitatory sensory nerve >> motor nerve >> BRAIN MUSCLE / GLANDS >> ORDINARY MOTION

INTRODUCE

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