Nervous System — Flashcards

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Coordination is the interaction of body activities according to the internal or external needs of the body. It helps different parts of the body work together properly.

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The two types of coordination are nervous coordination and chemical coordination. Nervous coordination is brought about by the nervous system, while chemical coordination is brought about by hormones.

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Nervous coordination is brought about by the nervous system. It is made up of the brain, spinal cord, nerves, and sense organs.

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A neuron is a nerve cell and is the structural and functional unit of the nervous system. It is made up of cyton, dendrites, and axon.

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The cyton is the main cell body of a neuron. It contains a nucleus and gives out fine processes called dendrites.

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Dendrites are cytoplasmic extensions of the cell body of a neuron. They receive impulses from organs and transmit them through the cell body into the axon.

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The axon is the long process of a neuron that transmits the message. The end of the axon terminates in terminal branches.

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A synapse is the point of contact between the terminal branches of the axon of one neuron and the dendrites of another neuron. Messages are transmitted across this point from one neuron to the next.