PSYC 3341 Lecture Notes - Lecture 2: Axoplasmic Transport, Multipolar Neuron, Unipolar Neuron

• School: University of Houston
• Department: Psychology
• Course: PSYC 3341
• Professor: Johanna Bick

Document Summary

Structure and functions of cells of the nervous system. Central nervous system (cns: brain and spinal cord. Peripheral nervous system (pns: part of the ns outside the brain and spinal cord. Includes nerves attached to brain and spinal cord. Cells: basic structure, soma, dendrite, synapse, axon, terminal buttons. Axoplasmic transport: propels substances within the axon, anterograde: movement from soma to button, retrograde: movement from button to soma. Central nervous system: glia: astrocytes, phagocytosis, oligodendrocytes, myelin sheath, microglia. Semi-permeable barrier between the cns and circulatory system helps to regulate the flow of nutrient rich fluid into the brain area postrema. Microelectrode: inserted into neuron to record electrical activity. Membrane potential: electrical charge across cell membrane. Resting potential: membrane potential of neuron not being altered by excitatory or inhibitory postsynaptic potentials. Depolarization: reduction (towards zero_ of the membrane potential. Force of diffusion: diffusion, electrostatic pressure, sodium-potassium transporter.