PSY 102 Lecture Notes - Lecture 3: Axon Terminal, Peripheral Nervous System, Neuroglia
Document Summary
* nerve cells and communication in the brain (written + multiple choice) * the central and peripheral nervous system (multiple choice only) * hormones and the endocrine systems (a few multiple choice) Neurons: the brain"s communicators: specialized in communication with each other, 86 billion neurons, with 160 billion connections, unique shape compared to other cells. Chemical messengers that allow neuron to neuron communication: synapse, space between neurons where nts travel. Glial cells: cell in the nervous system that plays a role in the formation of myelin and the blood-brain barrier; responds to injury, removes debris, and enhances learning and memory. Astrocytes (star shaped glial cells: most abundant, found in blood-brain barrier, control blood flow in brain. Oligodendrocytes: promotes new connections, produce the myelin sheath around axons, myelin sheath, glial cells wrapped around axons that act as insulators of the neuron"s signal.
