Nervous System. Functions of the Nervous System Monitor internal and external environments Integrate sensory information Coordinate voluntary and involuntary.

Slides:

Advertisements

Similar presentations

Fundamentals of the Nervous System and Nervous Tissue

Advertisements

Nervous Tissue: Neurons and Support Cells (glial cells)

The Nervous System- Nervous Tissue Chapter 13

The Nervous system has three major functions :  Sensory – monitors internal & external environment through presence of receptors  Integration – interpretation.

Lecture 12a. Nervous System Overview. Topics Divisions of the NS: CNS and PNS Structure and types of neurons Synapses Structure and function of glia in.

January 29, 2015 Objectives: ◦ Label the structure of a neuron ◦ Explain how the nervous system is broken up into parts ◦ Differentiate between neurons.

Functions of the Nervous System

Cranial Nerves, source: training.seer.cancer.gov

Nervous System Cells. The Nervous System The Nervous system is responsible for communication Composed of the: Brain Spinal Cord Nerves.

Essentials of Anatomy and Physiology Fifth edition Seeley, Stephens and Tate Slide 2.1 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin.

The Nervous System The master controlling and communicating system of the body Method of communication? Electrical impulses.

The Nervous System.

Anatomy and Physiology I The Nervous System Basic Structure and Function Instructor: Mary Holman.

Functions of the Nervous System Functions of the Nervous System  Sensory input – gathering information  To monitor changes occurring inside and outside.

Neural Tissue Chapter 12. I. Overview of the Nervous System A. Provides swift, but brief responses to stimuli B. Consists of: 1. Neural tissue: a. Neurons-

10.1: Introduction Cell types in neural tissue: Neurons

Neural Tissue The nervous system includes all the neural tissue in the body.

PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing.

ELAINE N. MARIEB EIGHTH EDITION 7 Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation by.

CHAPTER 13 Nervous Tissue COMMON COURSE OBJECTIVES: 1. Functions of the nervous system 2. Organization of the nervous system 3. Nerve tissue and nerve.

Detects changes in the body Make decisions Stimulate muscles or glands to respond Works by sending an electrical signal known as an action potential through.

 Monitors internal and external environment  Integrates sensory information  Coordinates all systems.

The Central Nervous System Made up of the brain and spinal cord Is responsible for integrating, coordinating, and processing sensory and motor commands.

Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slides 7.1 – 7.22 Seventh Edition Elaine.

Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Elaine N. Marieb Chapter 7 The Nervous.

The Nervous System. Introduction In all animals, except the sponges, responses to stimuli depend on the activities of networks of nerve cell, or neurons.

The Nervous System Part 1 “Organization of the Nervous System”

Chapter 7 The Nervous System. Functions of the Nervous System 1. Sensory input – gathering information  monitor changes inside and outside the body 

Chapter 12 Neural Tissue Bio 210 lab. Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings An Introduction to the Nervous.

The Nervous System. Functions of the Nervous System Receive Sensory Input Integrate Information (Immediate response, ignore it, store in memory) Control.

The Nervous System Chapter 6

NERVOUS SYSTEM NERVOUS TISSUE. Nervous System - General Control System Regulator of Homeostasis Electrical Impulses Rapid & Transient Effects.

Introduction to Nervous System. Composition of Nervous System Two main divisions Two main divisions 1) Central Nervous system (CNS) brain and spinal chord.

3 Functions of the Nervous System (SIM) 1. Sensory input—gathering information – monitor changes inside and outside the body – changes = stimuli – sensory.

Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slides 7.1 – 7.22 Seventh Edition Elaine.

The Nervous System maintains homeostasis and responds to stimuli faster than any other system! Part A. Organization Part B. Neural Tissue Chapter 12 Organization.

Copyright © 2010 Pearson Education, Inc. THE NERVOUS SYSTEM Ch. 7.

The master communication center of the body.. 3 Main Functions:  Monitor all information about changes occurring both inside and outside the body. 

DR /Noha Elsayed Anatomy &Physiology CLS 221 Nervous system.

A. providing sensation of the internal and external environments B. integrating sensory information C. coordinating voluntary and involuntary activities.

 Sensory input – gathering information ◦ To monitor changes occurring inside and outside the body ◦ Changes = stimuli  Integration ◦ To process and.

The Nervous System. Functions of the Nervous System 1. Monitors internal and external environment 2. Take in and analyzes information 3. Coordinates voluntary.

Histology of Nervous Tissue

9 Unit 1 Chapter 9. 9 Unit 1 Brain- Neurons enclosed in skull Spinal cord– connects to brain & enclosed in spinal cavity Nerves- bundles of neuronal axons.

Neural Tissue Chapter 12. I. Overview of the Nervous System A. Provides swift, but brief responses to stimuli As opposed to what?? B. Consists of: 1.

Organization, Function & Communication

 Sensory input — gathering information  To monitor changes occurring inside and outside the body  Changes = stimuli  Integration  To process and.

Organization of the Nervous System Exercise 7, 18.

The Nervous System- Nervous Tissue. The Nervous system has three major functions :  Sensory – monitors internal & external environment through presence.

Nervous System Notes Part 3. EVEN MORE INTERESTING NERVOUS SYSTEM FACTS The human brain alone consists of about 100 billion neurons. If all these neurons.

CHAPTER 7. FUNCTIONS 1. Sensory Input- sensory receptors respond to external and internal stimuli by generating nerve impulses that travel to the brain.

Nervous Tissue.

Nervous System An Introduction.

Nervous System.

The Nervous System- Nervous Tissue Chapter 13

Introduction to the Nervous System and Nerve Tissue

Ch. 7a The nervous system.

The Nervous System Mr. Nichols

NERVOUS SYSTEM.

ANATOMY Unit 2 Notes: Cells & Organization

The Nervous System.

Neural Tissue The nervous system includes all the neural tissue in the body.

Nervous System An Introduction.

The Nervous System- Nervous Tissue

ANATOMY Unit 2 Notes: Cells & Organization

The Nervous System.

The master communication center of the body.

8 The Nervous System.

Nervous System.

Histology of Nervous Tissue

Presentation transcript:

Nervous System

Functions of the Nervous System Monitor internal and external environments Integrate sensory information Coordinate voluntary and involuntary responses

Divisions of the Nervous System Central Nervous System Brain and spinal cord Peripheral Nervous System Somatic nervous system Autonomic nervous system Sympathetic nervous system Parasympathetic nervous system

Cellular Structures Neurons Dendrites Axon Myelin Sheath Synaptic terminals Neuroglia Regulate the environment around neurons Are phagocytes that help degrade waste material and foreign material

Types of Neurons Multipolar Neurons Two or more dendrites and a single axon Most common type of neuron in the CNS All motor neurons Unipolar Neurons Dendrites and axon are continuous Cell body lies off of one side of the axon Most sensory neurons in the PNS Bipolar Neurons Two axons and two sets of dendrites with a cell body in between them Very rare, typically found in specialized sense organs (eyes, ears, nose)

Sensory Neurons Roughly 10 million neurons in afferent division Receive information from internal and external environment, information is relayed to brain for interpretation Somatic Sensory Receptor External Receptors: information from external environment (touch, sight, taste, etc) Proprioceptors: position of limbs Visceral Receptors (internal receptors) Monitor activities of internal organs (stretch receptors in the bladder)

Motor Neurons Roughly 500,000 neurons in efferent division Act on an effector organ Divided into somatic motor neurons and visceral motor neurons

Interneurons Roughly 20 billion Link neurons together Allow for movement of messages between neurons

Neuroglia (CNS) Astrocytes Create the blood brain barrier BBB is caused by chemical secretions of astrocytes that make capillaries impermeable to most chemical compounds Parkinson’s Disease Oligodendrocytes Responsible for myelination in the CNS Creates “white matter” in the brain Increases the speed of action potentials through the axon Node of Ranvier

Neuroglia (CNS) Microglia Phagocytes Degrade waste material and foreign material Important for overall brain health Ependymal Line the ventricles and central canal of the spinal cord Responsible for making cerebrospinal fluid Responsible for circulating CSF

Neuroglia (PNS) Satellite cells Similar function to astrocytes Surround and support neurons Schwann cells Responsible for myelination in the PNS

Activity Draw a multipolar neuron Label the following structures: cell body, axon, myelin sheath, Node of Ranvier, dendrites, synaptic terminal In a paragraph, explain the role of glial cells (give specific examples)