Doncouse_Jeremy_Week11

Doncouse_Jeremy_Week11 - Running head: Chapter 11 1 Week 11...

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Running head: Chapter 11 1 Week 11 Written Assignment Jeremy Doncouse Mountain State University
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Running head: Chapter 11 2 Chapter 11: Fundamentals of the Nervous System and Nervous Tissue Functions and Divisions of the Nervous System 1. Explain the structural and functional division of the nervous system. The nervous system is divided into the central nervous system (CNS) consisting of the brain and spinal cord, and the peripheral nervous system (PNS) consisting of everything outside the CNS. The PNS has sensory and motor divisions. Sensory divisions convey impulses toward the CNS from the PNS while motor divisions carry impulses away from the CNS toward the PNS. The motor division also has two parts 1) somatic nervous system which carries impulses to skeletal muscle and 2) the autonomic nervous system (ANS) which carries impulses to smooth muscle, cardiac muscle, and glands. The ANS also has a sympathetic and parasympathetic division. Histology of the nervous system 1. Define neuron, describe its important structural components, and relate each to a functional role. Neurons, called nerve cells, are the structural units of the nervous system and conduct nerve impulses from one part of the body to another. They have extreme longevity and can last a lifetime. They are amitotic because they lose their ability to divide but there are exceptions found in olfactory epithelium and in some hippocampal regions which contain stem cells. Finally, they have a high metabolic rate and require constant supplies of oxygen and glucose.
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Running head: Chapter 11 3 Neurons are large, complex cells that have a cell body and one or more slender processes. The plasma membrane is the site of electrical signaling, and plays a crucial role in cell-to-cell interactions during development. The cell body, called the prokaryon or soma is located within the CNS. Clusters of cell
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This note was uploaded on 03/08/2011 for the course BIO 215 taught by Professor Amirafshar during the Fall '10 term at Mountain State.

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Doncouse_Jeremy_Week11 - Running head: Chapter 11 1 Week 11...

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