BIOLOGY 171 Lecture Notes - Lecture 31: Peripheral Nervous System, Central Nervous System, Sensory Neuron

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Nervous system: can take in information process information and pass it on, central nervous system: brain and spinal chord, peripheral nervous system: everything else, nerves are bundle of projections from neurons, bundle forms a nerve. Electrical signaling in the nervous system: electrical signals are originally generated in sensory neurons ( rst to take in info, communicate to interneuron, pass down to motor neuron, communicate to different part of body. Electrical signal: generated by movements of ions across plasma membranes (via ion channels) of nerve cells: electrical signals are simple events that mediate complex processes. Flow of information in the nervous system: information ows from sensory neurons, has receptor that takes in info, sensory neurons communicate to interneurons in brain and spinal cord, integrate info and send messages to motor neurons. Re exes are automatic: single bypasses the brain stimuli signals. Resting neurons: (before it receives: membrane a plasma charge separation.

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