AP Psychology chapter 3 study guide

Gamma-amino butyric acid
A neurotransmitter that inhibits the firing of neurons
Endorphins
A class of neurotransmitters that bind to opiate receptors and moderate pain
Glutamate
An excitatory neurotransmitter that helps strengthen synaptic connections between neurons
Dopamine
A neurotransmitter used in the parts of the brain involved in regulating movement and experiencing pleasure
Serotonin
A neurotransmitter used by cells in parts of the brain involved in the regulation of sleep, mood, and eating
Acetylcholine
A neurotransmitter used by neurons in the peripheral and central nervous systems in the control of functions ranging from muscle contraction and heart rate to digestion and memory
Norepinephrine
A neurotransmitter involved in arousal, as well as in learning and mood regulation
Glial cells
Cells in the nervous system that hold neurons together and help them communicate with one another
Myelin
A fatty substance that wraps around some axons and increases the speed of action potentials
Dendrites
Neuron fibers that receive signals from the axons of other neurons and carry those signals to the cell body
Synapses
The tiny gaps between neurons across which they communicate
Corpus callosum
A massive bundle of fibers that connects the right and left cerebral hemispheres and allows them to communicate with each other
Neurotransmitters
Chemicals that a neuron releases into a synapse