Nervous System Introduction.

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Presentation transcript:

Nervous System Introduction

What is the function of the Nervous System To receive information from a sensory neuron To process info. by the brain & spinal cord To respond by an effectors (muscle/gland)

Basic Anatomy Dendrites receive stimuli Nerve cell body @ nucleus transmits the stimuli Axon transmits the impulse to another dendrite Neuron Anatomy

Axon ending: terminal bud Transfers the electrical nerve impulse By chemical neuron-transmitters From one neuron to the next http://www.cartage.org.lb/en/kids/science/Biology Cells/Nervous System/Explore the Nervous System/Neuron/Gallery of Neurons/gall1.html

Sensory neurons or“receptors” receive a stimulus from: ears - hearing nose - smell skin - touch mouth - taste eyes - sight

Review What is the name of the nerve cell ? Does the stimulus travel one- way or down the neuron in two directions? Which part receives the stimuli? (The synapse, dendrites, cell body, or axon) Which is covered by a myelin sheath ? What is the purpose of the myelin sheath?