PSY 150 Lecture Notes - Lecture 3: Central Nervous System, Acetylcholine, Peripheral Nervous System
Document Summary
Neural firing - potassium ions readily pass through potassium channels into the. Thus, a resting neuron has a negative charge. If ion gates of a neuron are stimulated to open, they allow the sodium ions in. They flood faster than potassium ions flow out causing a brief positive charge to the neuron. The positive charge travels from dendrite to axon terminals. Neurons are separated by a gap called, the synaptic cleft. Each time a neuron fires, it releases neurotransmitters. More neurons - synaptic vesicles are spheres of neurotransmitter made in the. Neural firing drives them out of the axon into the synapse. They"re attracted by receptor sites on other neurons. Neurotransmitters attach to dendritic receptors, open the ion. Neurotransmitter is then expelled to be reuptake or degraded. Neurotransmitters - there are >100 different types of neurotransmitters in. Different neurons produce& respond to different combinations of neurotransmitters. Dopamine: used by reward centers of the brain, frontal lobes.
