PPT-Nervous Systems Consist of Circuits or Neurons and Supporting Cells

Concept 491 Mary Kathryn Pearson Susan Sabatier and Olivia Johnson Simple Nervous Systems In most animals with nervous systems clusters of neurons perform specialized functions Such clustering is absent in the cnidarians the simplest animals with nervous systems . Functions of the Nervous System. Sensory input – gathering information. To monitor changes occurring inside and outside the body. Changes = stimuli. Integration. To process and interpret sensory input and decide if action is needed. Nervous tissue is divided anatomically into . the . central nervous system (CNS), . which includes the brain and spinal cord, . and the . peripheral nervous system (PNS), . which includes the nerves outside the CNS and their. Structure and Function. 2. Input. (sensation). Output. (action). In order to understand behavior, we must understand the operating mechanism of the nervous system. What is the function of the nervous system?. Nervous system. Dr. . Makarchuk. . Iryna. The nervous system enables the body to respond to continuous changes in its external and internal environment. It controls and integrates the functional activities of the organs and organ systems. . Section 1 – Functions & Divisions of the Nervous System (pp. 386-387). This is your brain…. The Nervous System. And this is your brain – IN ANATOMY!!. Or better yet…. The Nervous System. Functions of the Nervous System. . chapter 29 in text. Objectives and Questions:. 1. I can describe the functions of the nervous system. 2. . I can describe the parts of a neuron cell and identify how they transmit electrochemical impulses.. All About Neurons. Neurons. are highly-specialized cells used by the nervous system to detect signals and transmit them to other neurons or response . effectors. (muscles or glands). Neuron Anatomy. glial. cells). Pages 227-234. Astro. cytes. Brace/anchor neurons, provide chemical barrier. Most abundant . glial. cells. Microglia. Destroy threatening particles/cells; phagocytes. Ependymal. cells. The Nervous System: Communication. Neurons are masses of nerve cells that transmit information. Three main components:. (1) Cell Body – contains the nucleus and two extensions. (2) Dendrites – shorter, more numerous, receive information. Chapter 11 and 12. Intro Animation. . 2. In the Biology 20 course, you studied some of the major body systems in the context of achieving homeostasis.. Homeostasis. : the process by which a constant internal environment is maintained despite changes in the environment.. is the main component of the two parts of the . nervous system. ; the . brain. and . spinal cord. of the . central nervous system. (CNS), and the branching peripheral nerves of the . peripheral nervous system. System. This work is licensed under a. Creative Commons Attribution 4.0 International License. (CC-BY).. Concepts of Biology. Chapter 16: . The Nervous System. An athlete’s nervous system is hard at work during the planning and execution of . Central nervous system comprises the brain and the spinal cord with nervous tissue making up the system. This system is the most intricate system in human body.. The nervous tissue consists of rich network of billions of nerve cells in both the CNS and PNS . Today. ’. s lecture. -What are nervous systems for. -A diversity of nervous system organizations. -Information processing. -A review of neuron structure. -Resting Potential. -Action potentials. -Synapses and neurotransmitters.