PSYC 2410 Chapter Notes - Chapter 3: Peripheral Nervous System, Somatic Nervous System, Sympathetic Nervous System
4 Feb 2019
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3. 1 - general layout of the nervous system. It is composed of afferent nerves that carry sensory signals from internal organs to the. Meninges, ventricles and cerebrospinal fluid: the brain and spinal cord (the cns) are the most protected organs in the body, they are encased in bone and covered by three protective membranes, the three meninges. Blood-brain barrier: the mechanism that impedes the passage of many toxic substances from the blood into the brain is known as the blood-brain barrier, this barrier is a consequence of the special structure of cerebral blood vessels. In the rest of the body, the cells that compose the walls of blood vessels are loosely packed, resulting in most molecules passing readily through them into surrounding tissue. 3. 2 - cells of the nervous system: there are two different types of cells within the nervous system, neurons, glial cells.
