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Understanding the Nervous System: Functions and Reflex Arcs

Explore the Central and Peripheral Nervous Systems, nerves, ganglia, brain, spinal cord, motor and sensory neurons, reflex arcs, and how signals bypass the brain for quick actions. Learn about receptors, effectors, antagonistic muscles, and sensory organs such as those handling light accommodation in the eye.

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Understanding the Nervous System: Functions and Reflex Arcs

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  1. The Nervous System

  2. The Nervous System Central Nervous System Peripheral Nervous System nerves and ganglia outside of the brain and spinal cord • Brain and Spinal Cord

  3. Motor Neuron

  4. Relay and Sensory Neurons

  5. Reflex Arc • Signal goes • Sensory -> Relay -> Motor • Action bypasses brain

  6. Reflex Arc Receptor Effectors The muscle that moves to avoid the pain. • The nerve that “feels” the pain Muscles can only pull, never push!

  7. Antagonistic Muscles- Muscles that work against each other.

  8. Sensory Organs • Groups of receptor cells responding to stimuli. Such as: Light, sound, touch, temperature and chemicals

  9. Light Accommodations of the Eye

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