01:119:116 Study Guide - Final Guide: Radial Glial Cell, Autonomic Nervous System, Peripheral Nervous System
28 Nov 2017
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No central control organ no brain. Simple cns true brain, eyespots at anterior detect stimuli. 2 longitudinal nerve cords w traversing nerves. Characterized by cilia circulate cerebrospinal fluid. Promote vasodilation near active neurons increase in oxygen and glucose. Helps move cns fluids removes excess k+ and na+ ions. Cns immune cells phagocytic = eat foreign invaders, cell debris. Branched cells each branch generates 1 myelin sheath around cns axons. Plasma membrane rich in myelin insulation around the cells. Do not have cell body with appendages. Glial cells in adult develop from radial glia in embryo. Gray matter surrounds canal no myelin. Csf provides hormones, nutrients, takes away waste. Nerves hind part of brain; in head + upper body. Nerves origin in spinal cord; entire body. Goes either to autonomic nervous system or motor system. Efferent neurons to glands, heart, smooth muscle (involuntary actions) Part of cns that controls what we are not aware of digestive, cardiovascular,
