PSY 2502 Lecture Notes - Lecture 1: Axon Hillock, Axon Terminal, Peripheral Nervous System
12 Apr 2016
School
Department
Course
Professor
Document Summary
The nervous system: central nervous system: Brain and spinal cord: peripheral nervous system: Comprised of nerve tissue located outside of the brain and spinal. Glial cells: cord: support system, provide physical support, control, nutrient flow, and are involved in phagocytosis, types of glial cells: Astrocytes: star shaped, forms the blood brain barrier, filters the blood, when blood enters the brain. Microglia: involved in getting rid of waste. Oligodendrocytes/schwann cells: form the myelin sheath on axons. The action potential is not directly sent from one neuron to the other. Once action potential reach terminal button, voltage gated calcium (ca+) open when the cell is depolarized (when action potential arrives to terminal button) Calcium flows into the cell when depolarized. Post synaptic element has receptors on their membrane, the. Ion channels (ligand gated channels: binding of a neurotransmitter to a receptor) will open up in response to the binding/activation of the receptor and release ions (na+, k+)
