PSYC 100 Lecture Notes - Lecture 5: Agonist, Threshold Potential, Action Potential

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jill L Atkinson

Document Summary

Notes composed of the brain and the spinal cord, neurons and glial cells glial cells serve supportive and protective functions, supply oxygen and nutrients to neurons, remove dead cells and germs, and serve as a protective layer around axons. Made up of skeletal ns, sensory/afferent ns, motor/efferent ns, autonomic. Ns, sympathetic and parasympathetic ns includes nerves from spinal cord and sensory organs, which transmit sensory info from the body cns, and motor info and other commands from cns muscles, glands, organs. Controls muscles, relaying motor commands from the brain. Controls involuntary muscles and many internal organs, plays an important part in homeostasis. Fight or flight, high arousal/alertness, mobilizes body for rapid energy expenditure, inhibits digestion. Rest and digest, enhances internal process related to digestion of food. Sensory neurons detect info from physical world, pass info to brain (afferent brain) Motor neurons direct muscle contractions/dilations, efferent because brain body.