MSU BIO215 Lecture - Week 13 Objective Assignment

MSU BIO215 Lecture - Week 13 Objective Assignment - BIOL215...

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BIOL215 Lecture Week 13 Objective Assignment Chapter 13: The Peripheral Nervous System and Reflex Activity 1. Define peripheral nervous system and list its components. The peripheral nervous system is the portion of the nervous system consisting of nerves and ganglia that lie outside of the brain and spinal cord. The PNS is the division of the nervous system that connects the central nervous system to other parts of the body. Two main components of the PNS: Sensory (afferent) pathways that provide input from the body into the CNS. Motor (efferent) pathways that carry signals to muscles and glands (effectors). Part 2: Transmission Lines: Nerves and their structure and repair. Nerves and associated ganglia. 1. Describe the general structure of a nerve, and follow the process of nerve fiber regeneration. A nerve is usually made up from a variety of fascicles. Each fascicle is encased by perineurium. Inside the fascicle are a group of axons bathed in endoneural fluid. Each axon has an insulating lining of myelin – a fatty material inside the Schwann cells. Between the fascicles is a fatty material called the interfascicular epineurium.
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MSU BIO215 Lecture - Week 13 Objective Assignment - BIOL215...

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