PS268 Chapter Notes - Chapter 4: Locus Coeruleus, Raphe Nuclei, Phlegm
Document Summary
Components of the nervous system: glia. Glia not only communicate with one another but also communicates with neurons and modulate their activity. Astrocytes supply glucose needed for nerve activity. Connected with one another via gap junctions. Network of interconnected astrocytes forms a network that behaves like a single entity. Plays major role in modulating neuronal activities. Only small lipophilic molecules enter the brain. Extent to which chemicals can be dissolved in oils and fats. Heroin has more rapid onset of effects and more potent than morphine because it is more lipophilic: neurons. Primary elements of nervous system responsible for analyzing and transmitting information. Everything dependent on the functioning of these cells. Cell body contains nucleus and other substances that sustain the neuron. Axon responsible for conducting electrical signal to presynaptic terminals. Large doses of amphetamines can destroy axons and presynaptic terminals. Essential process for neuronal communication is the action potential.
