PSYCH 1XX3 Lecture Notes - Lecture 3: Inhibitory Postsynaptic Potential, Neural Tube, Myelin

• School: McMaster University
• Department: Psychology
• Course: PSYCH 1XX3
• Professor: Joe Kim

Document Summary

Unit 3: the action potential: cell membrane, selectively permeable; allowing different ions to pass through it w/ ease, contains a number of protein channels which act as passageways for ions to pass through ex. Diffusion => na ions rush into neuron make charge of inside of cell more : 3. Electrostatic force begins to push some of the + charged k ions out of the cell through the leaky k channels: 4. + charge builds up inside the cells => voltage gated k channels open => more k ions rush out of cell: 5. After peak charge of +40mv on the inside, na channels close (na stops entering the cell but k continues to rush outward: 6. Inside of cell loses + charge & continues to fall and actually overshoot baseline -70mv => voltage gated k channels are closed: 7.