The Nervous System

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1. Give two examples of effectors.

  • Eyes and ears are effectors. Eyes detect light, Ears detect smell.
  • Muscles and glands are effectors. Muscles contract, Glands secrete hormones.
  • Muscles and organs are effectors. Muscles contract, Organs respond by changing.
  • Muscles and skin are effectors. Muscles contract, skin relaxes.
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2. What are the five different Sense Organs?

  • Mouth, Brain, Muscles, Organs, Lungs
  • Sight, taste, touch, smell, sound
  • Eyes, tongue, skin, ears, nose
  • Skin, touch, ears, sound, eyes

3. Define what receptors do.

  • They send information to the CNS
  • They change stimulus energy into electrical impulses
  • They recieve the stimulus and respond accordingly
  • They lose their energy and stop moving

4. What is the difference between a receptor and a sense organ?

  • Sense organs contain myelin sheath and neurones, which send impulses to the CNS. Receptors recieve this impulses
  • Receptors are groups of cells which are sensitive to a stimulus, Sense Organs contain these receptors
  • Sense organs are groups of cells which are sensitive to a stimulus, Receptors contain these sense organs
  • Sense organs e.g the eye contain light receptors.

5. What does the CNS do?

  • The CNS (Central Nervous System) is where all information from the sense organs is sent, and where reflexes and actions are coordinated
  • The CNS (Central Nervous System) is where all information from the neurons are sent, and where reflexes and actions are coordinated
  • The CNS (Central Nervous System) is where all information from the sense organs is released, and where reflexes and actions are coordinated
  • The CNS (Central Nervous System) is where all information from the sense organs is sent, and where receptors and sense organs are coordinated

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