BIOL 4160 : TEST 2 NOTES

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15 Mar 2019
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Central nervous system (cns: consists of brain and spinal cord. Afferent neurons: inform cns about conditions in both the external and internal environment, at its peripheral ending, there is a sensory receptor that generates action potentials in response to stimuli. Efferent neurons: carry instructions from cns to effector organs muscles and glands. But after a few minutes, it is comfortable bc your interneurons responded to that new afferent information: the more interneurons involved, the slower the response. So reflexes do not go through many interneurons. Remove foreign invaders or excess tissue by phagocytosis: release destructive chemicals that is suspected to play a role in. Alzheimer"s disease, multiple sclerosis, and dementia: in resting state release low levels of growth factors that help neurons and other glial cells survive and thrive, nerve growth factor = helps neurons and glial cells survive. Unlike neurons, glial cells do not lose the ability to divide, so most brain tumors consist of glia.

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