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Responding to External Change

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  • True or False: The retina is in the ear.
    False – it is in the eye
  • What is the plural of stimulus?
    Stimuli
  • Which sense organ uses the optic nerve?
    Eye
  • True or False: The cochlea is in the eye.
    False – it is in the ear
  • Which sensory neurons in the ear convert vibrations into nerve impulses?
    Auditory hair cells in the cochlea.
  • What kind of receptor detects temperature?
    Thermoreceptors
  • What causes the eardrum to vibrate?
    Vibrating air particles (sound waves)
  • What does the brain do with signals from the optic nerve?
    Interprets them as vision
  • What does the brain do with signals from the auditory nerve?
    Interprets them as hearing
  • What kind of receptor detects light in the eye?
    Photoreceptors
  • What happens if the retina is damaged?
    Vision is impaired or lost
  • What structure separates the outer ear from the middle ear?
    The eardrum
  • What cells in the retina transform light into nerve signals?
    Photoreceptors
  • What part of the ear contains the cochlea?
    Inner ear
  • What is a stimulus?
    Any information an organism receives that might cause it to respond
  • What kind of receptor detects sound vibrations in the ear?
    Mechanoreceptors
  • What part of the eye controls how much light enters?
    The pupil
  • What kind of receptor detects pain in the skin?
    Pain receptors / nociceptors
  • Which part of the ear helps with balance?
    Semicircular canals
  • What part of the ear amplifies vibrations?
    Middle ear bones (ossicles)
  • What happens if sound cannot be transferred through the ear canal?
    Hearing is reduced or lost
  • What structure in the eye helps focus light onto the retina?
    The lens
  • Which nerve carries information from the eye to the brain?
    Optic nerve
  • What connects the middle ear to the back of the throat?
    Eustachian tube
  • Which nerve carries information from the ear to the brain?
    Auditory nerve
  • Where does light form an upside-down image in the eye?
    On the retina
  • Which organs are the major sense organs?
    Eyes, ears, tongue, nose, skin
  • What does the pupil of the eye do?
    Changes size to control how much light enters
  • What part of the eye gives it colour?
    The iris
  • What is the flap of the ear called?
    Auricle (or pinna)
  • Which sense organ uses the auditory nerve?
    Ear
  • Where are the vibrations transferred after the eardrum?
    To the tiny bones of the middle ear
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