How the Nervous System Works
-
Upload
britanni-rogers -
Category
Documents
-
view
45 -
download
0
description
Transcript of How the Nervous System Works
![Page 1: How the Nervous System Works](https://reader030.fdocuments.net/reader030/viewer/2022033022/5681302c550346895d95c002/html5/thumbnails/1.jpg)
How the Nervous System WorksHB&H Chapter 7.1
Pages 190-194
![Page 2: How the Nervous System Works](https://reader030.fdocuments.net/reader030/viewer/2022033022/5681302c550346895d95c002/html5/thumbnails/2.jpg)
Jobs of the Nervous System• This system includes your brain, spinal cord
and the nerves throughout your body– Also includes sense organs like eyes and ears.
![Page 3: How the Nervous System Works](https://reader030.fdocuments.net/reader030/viewer/2022033022/5681302c550346895d95c002/html5/thumbnails/3.jpg)
1. Receiving Information2. Responding to
Information
3. Maintaining Homeostasis
• What is a Stimulus? A Response?
• Stimulus: a change in environment
• Response: reaction to a stimulus
• Homeostasis: stability of an organism’s internal environment.
Jobs of the Nervous System• Your nervous system operates in 3 different ways:
![Page 4: How the Nervous System Works](https://reader030.fdocuments.net/reader030/viewer/2022033022/5681302c550346895d95c002/html5/thumbnails/4.jpg)
Neurons• Neurons are cells that
carry information through your nervous system
• The information neurons carry are called nerve Impulses– Impulses travel up to 120
meters per second.
![Page 5: How the Nervous System Works](https://reader030.fdocuments.net/reader030/viewer/2022033022/5681302c550346895d95c002/html5/thumbnails/5.jpg)
Neurons Structure
• The impulse is then sent away from the Neuron through an Axon (like arteries).
• Neurons have a nucleus inside a Cell Body• Impulses come to the Cell Body from Dendrites
![Page 6: How the Nervous System Works](https://reader030.fdocuments.net/reader030/viewer/2022033022/5681302c550346895d95c002/html5/thumbnails/6.jpg)
Motor Neuron
• Sends impulses to muscles, resulting in movement
Interneuron
• Carries impulses from one neuron to the next
Sensory Neuron
• Detects stimuli
• Converts stimuli into impulses
Neuron Types
![Page 7: How the Nervous System Works](https://reader030.fdocuments.net/reader030/viewer/2022033022/5681302c550346895d95c002/html5/thumbnails/7.jpg)
Exit PassWhat is a Neuron and
what do they carry?
![Page 8: How the Nervous System Works](https://reader030.fdocuments.net/reader030/viewer/2022033022/5681302c550346895d95c002/html5/thumbnails/8.jpg)
What to Work On
DUE: Friday, February 17th
• Read Section 7.1 (pages 190-194)• Answer the Section Review Questions
(page 194, #’s 1-3)