Download presentation
Presentation is loading. Please wait.
Published byPamela Park Modified over 8 years ago
1
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Human Anatomy & Physiology SEVENTH EDITION Elaine N. Marieb Katja Hoehn PowerPoint ® Lecture Slides prepared by Vince Austin, Bluegrass Technical and Community College C H A P T E R 11 Fundamentals of the Nervous System and Nervous Tissue P A R T A
2
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Nervous System master controlling and communicating system of the body Functions: _____________________________ – monitoring stimuli; info gathered See a red traffic light _____________________________ – interpretation of sensory input “Red means stop” _____________________________– response to stimuli Foot goes on brake
3
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Nervous System Figure 11.1
4
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Organization of the Nervous System _____________________________(CNS) Brain and spinal cord Integration and command center Interprets sensory input/dictates responses _____________________________(PNS) - nerves ______________nerves- carries impulses to/from spinal cord ______________ nerves- carry impulses to and from the brain
5
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Peripheral Nervous System (PNS): Two Functional Divisions Sensory (afferent) division-“carry __________” ____________________ afferent fibers – carry impulses from skin, skeletal muscles, and joints to the brain ____________________afferent fibers – transmit impulses from visceral organs to the brain Motor (efferent) division- “carry _________” Transmits impulses from the CNS to effector organs
6
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Motor Division: Two Main Parts Somatic (___________________) nervous system Conscious control of __________________ muscles Autonomic (__________________) nervous system (ANS) Regulates ______________ muscle, ________________ muscle, and glands Divisions – sympathetic and parasympathetic
7
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Histology of Nerve Tissue The two principal cell types of the nervous system are: __________________________ – excitable cells that transmit electrical signals __________________________ cells – cells that surround and wrap neurons
8
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Neurons (Nerve Cells) Structural units of the nervous system Composed of a ________________________, ___________________, ____________________ Long-lived, ______________________________, and have a high metabolic rate plasma membrane functions: Electrical signaling Cell-to-cell signaling during development PLAY InterActive Physiology ®: Nervous System I, Anatomy Review, page 4
9
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Neurons (Nerve Cells) Figure 11.4b
10
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Nerve Cell Body (Perikaryon or Soma) Contains the ________________ and a nucleolus Two types of Processes (armlike extensions): ______________________ Usually one unbranched axon per neuron FUNCTION: Generate and transmit action potentials; Secrete neurotransmitters from the axonal terminals _______________________ Short, tapering, and diffusely branched processes They are the receptive, or input, regions of the neuron Electrical signals are conveyed as graded potentials (not action potentials)
11
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Myelin Sheath Whitish, fatty (protein-lipid), _________________ sheath around most long axons It functions to: _____________________ the axon Electrically _______________________ fibers from one another Increase the ______________________of nerve impulse transmission
12
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Regions of the Brain and Spinal Cord __________________________ matter – dense collections of myelinated fibers __________________________ matter – mostly soma and unmyelinated fibers
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.