PSY 1101 Chapter Notes - Chapter 2: Peripheral Nervous System, Homeostasis, Reward System

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Najwa Haddad

Document Summary

All neurons & nerves in body outside of cns: communication system. Uses info to send instructions to rest of body. Generates conscious experience" being aware of self & surrounding environment. Receives info from environment via senses, sends to cns for further processing. Most complex jobs (receive info from sensory neurons, analyze, organize, integrate info, use info to instruct body what to do) Receive instructions from interneuron, deliver to rest of body. Manufactures anything neuron needs to grow, function, survive. Extend from soma, increasing surface are without taking up much room. Carries/delivers message produced by neuron to other neurons. Axon branches with axon terminals at the end, which release neurotransmitters. Brain consists of 80% water, found inside & outside neurons. Contains dissolved chemicals such as na+, cl-, k+ ions. Inside has higher amounts of negative ions, outside has more positive (-70 mv) resting membrane potential, inside 70mv more negative.