New structure and the path of a nerve impulse

• What is the function of sense organs?

  To detect stimuli from the environment
• Which organ is responsible for taste?

  Tongue
• What sensations does the skin detect?

  Touch, temperature, pain, pressure
• What organ is responsible for sight?

  Eyes
• Which organ is responsible for smell?

  Nose
• What organ is responsible for hearing?

  Ears
• What do sensory receptors detect?

  Stimuli such as chemicals and light
• What happens when someone tastes chocolate?

  Sensory receptors detect sweet chemicals
• How does a nerve impulse travel to the brain?

  Through sensory neurones to relay neurones
• What role does the brain play in sensory processing?

  It coordinates and decides actions based on information
• What does the brain do after recognizing sweet chemicals?

  It tells muscles to move to eat more
• What is the pathway of a nerve impulse when tasting chocolate?

  From sensory neurone to relay neurone to brain
• What happens after the brain sends an impulse to the muscles?

  Muscle cells contract to move
• What is a synapse?

  A gap between neurones
• What is the role of relay neurones?

  To transmit impulses to the brain
• What is the function of motor neurones?

  To send impulses to muscle cells
• What is the process of sensory information transmission?

  1. Stimulus detected by sensory receptors
  2. Nerve impulse sent through sensory neurone
  3. Impulse travels to relay neurone in spinal cord
  4. Relay neurone transmits impulse to the brain
  5. Brain processes information and sends impulse to motor neurone
  6. Motor neurone sends impulse to muscle cells to contract
• What are the components involved in the sensory processing pathway?

  • Sensory receptors
  • Sensory neurones
  • Relay neurones
  • Brain
  • Motor neurones
  • Muscle cells