Module 9_ Nervous Tissue.pdf

Module 9: Nervous Tissue Overview Introduction Nervous tissue, as discussed in Chapter 12 of your textbook, is one of the four main types of tissues in the human body. Nervous tissue is found in the brain, spinal cord, and nerves, and comprises all parts of the nervous system. The nervous system is...

Module 9: Nervous Tissue Overview Introduction Nervous tissue, as discussed in Chapter 12 of your textbook, is one of the four main types of tissues in the human body. Nervous tissue is found in the brain, spinal cord, and nerves, and comprises all parts of the nervous system. The nervous system is responsible for sensing stimuli and transmitting signals to and from the different body parts; therefore, it monitors organs, creates an awareness of our surroundings through our senses, coordinates muscle activity, and initiates actions. It also plays a major role in our emotions, behaviours, memory, and reasoning. The nervous system, along with the endocrine system, helps to ensure that conditions such as body temperature and blood electrolytes stay within healthy limits and that homeostasis is maintained. This module discusses the structures, properties, and functions of the nervous system. Objectives Overview 1. Fully discuss the three basic functions of the nervous system. 2. Describe the organization and structure of the nervous system. 3. Describe the structure of a neuron. 4. Define neuroglia; list its six types; and state their function. 5. Describe the production and function of myelin. 6. Compare and contrast the structure of white matter and gray matter in the central nervous system (CNS). 7. Describe the cellular properties that permit communication among neurons and effectors. 8. Describe the factors that maintain a resting membrane potential. 9. List and explain the events involved in the generation of an action potential in a neuron. 10. Define refractory period. 11. Describe the conduction of an impulse. 12. Discuss the events of signal transmission at a synapse. 13. Discuss neurotransmitters. Note To accomplish these objectives, carefully read through Chapter 12: “The Nervous System and Nervous Tissue” in your textbook, OpenStax A&P. Relevant passages are referenced under each objective in this module. The most important figures and tables have been copied herein for your convenience, and edited for content in some cases. Complete the self-test at the end of the module to identify any topics requiring further study. Contact your Open Learning Faculty Member if you need assistance. Licenses and Attributions: All figures and tables are taken or modified from OpenStax A&P under a Creative Commons 4.0 License, unless indicated otherwise. All micrographs are provided by the Regents of University of Michigan Medical School @ 2012. For each module in BIOL 1593, a list of Online Educational Resources (OERs), i.e., animations, videos and/or quizzes, has been compiled to support the teaching and learning of your course materials. These OERs are optional to view, but you may find them helpful as they are presented in a lecture format by experts in anatomy and physiology. The Objectives in your modules and the pages referenced in your text remain the basis for the questions on your exams.