PSY 1101 Study Guide - Midterm Guide: Brainstem, Corpus Callosum, Mescaline

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Kenneth Campbell

Document Summary

Cell membrane has pores which allows for diffusion of chemicals, dendrites receive messages from other neurons. Action potentials: when critical threshold is reached, the neuron fires, the action potential will travel down the length of the axon, may subsequently influence the firing of another neuron. All-or-none law: using light to turn neurons on or off, newest research method, extremely useful, the action potential will travel down (will be propagated) the length of the axon, the amplitude of the axon potential will not vary. This is the all or none law: we either get the action potential or we do not, increasing the intensity of stimulation will not increase the action potential. Propagation of action potential: action potential will travel down the length of the axon, process is slow in unmyelinated axon, long axons are myelinated, the myelin sheath is not continuous.