Lecture5 Nervous System

Lecture5 Nervous System - Nervous S Nervous S Neurons have...

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Nervous S Nervous S Nervous S Multipolar neuron Bipolar neuron Multipolar neurons Unipolar neurons Nervous S Cell body - This main part has all of the necessary components of the cell, such as the nucleus (contains DNA), endoplasmic reticulum and ribosomes (for building proteins) and mitochondria (for making energy). If the cell body dies, the neuron dies. Dendrites or nerve endings - These small, branch- like projections of the cell make connections to other cells and allow the neuron to talk with other cells or perceive the environment. Dendrites can be located on one or both ends of the cell. Neurons have three basic parts: Nervous S Axon - This long, cable-like projection of the cell carries the electrochemical message (nerve impulse or action potential) along the length of the cell. Depending upon the type of neuron, axons can be covered with a thin layer of myelin, like an insulated electrical wire. Myelin is made of fat, and it helps to speed transmission of a nerve impulse down a long axon. Myelinated neurons are typically found in the peripheral nerves (sensory and motor neurons), while non-myelinated neurons are found in the brain and spinal cord. Neurons have three basic parts: Nervous S Generate electricity Secrete chemicals What Do Neurons Do? Neurons are excitable cells that generate and carry electrical signals
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Nervous S Much of what we know about how neurons work comes from experiments on the giant axon of the squid. This giant axon
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Lecture5 Nervous System - Nervous S Nervous S Neurons have...

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