PSY100Y5 Lecture Notes - Lecture 3: Parietal Lobe, Hypothalamus, Axon
13
PSY100Y5 Full Course Notes
Verified Note
13 documents
Document Summary
The glia- white matter that holds the brain together. May have limited participation in sending information through the brain. Neurons (100 billion with thousands of connections to each other. Responsible for majority of transmissions throughout the brain. Learning is the result of neurons connecting to each other. Receive neurotransmitters that bind into receptor sites and lock. Neurotransmitters send messages that are either excitatory or inhibitory. When threshold is reached it takes energy and sends it along the axon (neuro-impulse or action potential) Can come together to create a nerve fiber. Facilitates speed in which we process information (100 m/s) Conducts electricity quickly therefore, the more myelin there is, the faster the impulse is transmitted (jumps from myelin to myelin rather than traveling directily along the axon) More negative than positive ions, resting potential is lowered. When channels open, sodium flows (create positive energy) in until threshold is reached. Then sodium channels close and potassium channels open- potassium flows out.
