Health Sciences 3300A/B Lecture Notes - Lecture 1: Homeostasis, White Matter, Oligodendrocyte
9 Jan 2019
School
Department
Course
Professor
Document Summary
Lecture 1 - organization of the nervous system & nervous tissue. Composed of the brain and the spinal cord. Everything outside of the brain and spinal cord that has to do with the nervous system and transmitting nerve impulses. It is important to make distinctions because different types of cells support these neurons. The whole purpose of a nervous system is to interact with the environment and be able to properly react. The purpose is to receive different types of information, assemble the information and respond to it. Afferent signals come into the spinal cord and brain (sensory neurons) Efferent signals leave the cns and go towards the pns (motor neurons) Sends information out to our skeletal muscles, glands, and organs. The main difference is that the ans is involuntary and the sns is voluntary. Sympathetic information is fight-or-flight to keep you alive and safe, parasympathetic information is rest-and-digest and saves energy.
