PSY 102 Lecture Notes - Lecture 3: Neuroglia, Synaptic Vesicle, Motor Neuron

• School: Ryerson University
• Department: Psychology
• Course: PSY 102
• Professor: Tisha Ornstein

Document Summary

Interneuron (bipolar: helps relay information and communication between cells, a neuron located entirely within the central nervous system. Components of a neuron: soma, cell body of a neuron, metabolic centre, genetic material stored here, information processed here, contains nucleus. Blood-brain barrier: helps keep things separate, blood is protected by glial cells, semipermeable barrier, keeps blood and brain tissue and fluids separated. Fact or fiction: some human nerve cells are three feet long, fact, whole process from cell to cell is electrochemical. All-or-none law: the principle that once an action potential triggered in an axon, it is propagated without decrement to the end of the fibre. Termination of postsynaptic potentials: reuptake, the re-entry of a neurotransmitter just liberated by a terminal button back through its membrane, thus terminating the postsynaptic potential, enzymatic deactivation: The destruction of a neurotransmitter by an enzyme after its release, for example the destruction of acetylcholine by acetylcholinesterase.