Psychology 1000 Lecture Notes - Lecture 6: Motor Neuron, Thermoregulation, Exocytosis

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

2/3 of all neurons housed in cortex. Each neuron has a job, communicate with other neurons. Brain works by creating networks among nerve cells. Neurons use electric and chemical signals to communicate. One neuron releases chemicals over the synapse, and the gates of the other receive the sodium and potassium ions to continue the action potential, through this creating a communication between 2 neurons. Extracellular fluid, has a semipermeable cell membrane. Contains na, cl, k, a(protein molecule) ions within the neuron. Na, k and cl ions outside the cell as well. Ionic charge on the cell membrane because of ion concentration, inside negative, outside positive. 70 mv, resting potential when nothing is happening: stimulated, incoming sensation, change in electrical potential, goes from -70 and goes positive. Depolarization, result of na inflow, changing the ionic concentration inside the cell with stimulation. 55 mv is the threshold, all holes open and na has a giant inflow into the cell.