How the Nervous System Works
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Transcript of How the Nervous System Works
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How the Nervous System WorksHB&H Chapter 7.1
Pages 190-194
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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
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1. Receiving Information2. Responding to
Information3. Maintaining
Homeostasis
• What is a Stimulus? A Response?
• Homeostasis: stability of an organisms internal environment
Jobs of the Nervous System• Your nervous system operates in 3 different ways:
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Neurons• Neurons are cells that
carry information through your nervous system
• The information neurons carry are called nerve Impulses– Impulses travel up 120
meters per second
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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
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Motor N
euron • Sends
impulses to muscles, resulting in movement
Interneuron
• Carries impulses from one neuron to the next
Sensory N
euron
• Detects stimuli
• Converts stimuli into impulses
Neuron Types
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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)