Module 1 Lesson 2 Assignment.docx - Module 1 Lesson 2 Assignment 1 Explain why the brain has elevated requirements for nutrients and oxygen The brain

Module 1 Lesson 2 Assignment.docx - Module 1 Lesson 2...

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Module 1: Lesson 2 Assignment 1. Explain why the brain has elevated requirements for nutrients and oxygen. The brain has elevated requirements for nutrients and oxygen because nutrients and oxygen are necessary for the brain to function properly. A brain is only 2% of the body's total weight, but it uses at least 20% of the body’s oxygen and energy supplies. 2. Describe the three main tissues that support and protect the central nervous system. The three main tissues that support and protect the central nervous system are the meninges, white matter and grey matter. The meninges are three layers of tough, elastic tissue within the skull and spinal column. Grey matter contains mostly cell bodies, dendrites, and short, unmyelinated axons, Grey matter is found around the outside areas of the brain and forms the H-shaped core of the spinal cord. White matter contains myelinated axons that run together in tracts. It forms the inner regions of a part of the brain, and also the outer area of the spinal cord. 3. Explain why a physician takes a sample of cerebrospinal fluid to determine if a person has meningitis. Meningitis, or the inflammation of the meninges, is a potentially life threatening
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