CAS PS 101 Chapter Notes - Chapter 3: Peripheral Nervous System, Semipermeable Membrane, Resting Potential

• School: Boston University
• Department: Psychological & Brain Sciences
• Course: CAS PS 101
• Professor: Ira Wells

Document Summary

Communicate with millions of other neurons and create neural networks. Peripheral nervous system all other nerve cells in rest of body. Pns sends info to cns and cns organizes and evaluates the info and then directs the. Neurons are powered by electrical impulses and send chemical signals. Sensory neurons: detect info from physical world and pass that info to brain through spinal cord. Nerves that provide info from skin and muscles are known as somatosensory nerves. Motor neurons: direct muscles to contract or relax, producing movement. Interneurons integrate neural activity within a single area rather than transmitting info to other brain structures or body organs. Dendrites branchlike appendages that detect chemical signals from neighboring neurons. Cell body info received from dendrites is integrated and collected. Axon electrical impulses are transmitted along this narrow outgrowth. Nerve is a bundle of axons that carry info between brain and other locations in body.