PHYS 1010 Lecture Notes - Lecture 2: Axon Terminal, Schwann Cell, Curare
Document Summary
It is not separate from the brain: the neuron, anatomy. Axon i. ii. iii: myelin, some neurons have myelin, some don"t. The smaller ones don"t need it to speed up the message, but longer or action neurons have myelin. Dendrite, cell body (soma), myelin sheath (schwann cell), node of ranvier, axon, and axon terminals. Axon terminals are connected to dendrites to send signals to other neurons. The order in which they fire, the pattern, are your memories, thoughts, emotions, etc. Neuron interior charged at-70 mv, inside the neuron has a negative charge. When you generate an impulse, the very first thing that happens is that the gates open (sodium and potassium). These open up and you get some diffusion where the ions are pumped in and out: negative inside and positive outside. All of a sudden, the inside of negative mv changes to a positive of 50 mv. Movements of ions make the internal charge of +50 mv.
