PSYB64H3 Chapter Notes - Chapter 3: Acetylcholine, Depolarization, Nucleus Accumbens
Document Summary
Tetrodotoxincan cause death by blocking voltage-dependent sodium channels in the membranes of nerve fibers. Neuron membranes separate intracellular fluid from extracellular fluid. The neural cytoskeleton provides structural support that maintains the shape of the neuron. All cells have membranes, nuclei, and small internal structures known as organelles, many of these structures are found within the main mass of the neuron (cellbody/soma) Neurons differ structurally from other cells int hat they have specialized branches extending from the cell body, known as axons and dendrites. Primary task is to form a boundary between the cell and its external environment, in this case intracellular fluid from the extracellular fluid. Membrane is a bi-layer composed largely of phospholipids and other lipids studded with proteins and other large molecules , this separates inner and extracellular fluid. They do this inspite of being only two phospholipid molecules wide, with a thickness of only 5 nanometers.
