Study

4th Grade Human Machine Review

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  • Which part of our eye acts like a screen?
    retina
  • What is a pupil?
    The dark hole in the center of the eye
  • Why do our pupils get larger in a dark room?
    to let in more light so we can see
  • What part of the eye is in the front?
    cornea lens
  • Name one thing our brains do
    makes decisions, stores memories, holds our emotions
  • What is the difference between human eyes and a nocturnal animal's eyes?
    human eyes have smaller pupils and no reflective layer
  • The brain sends a message with the ________ to the rest of the body.
    nerves
  • What kind of animals sleep during the day and are most active at night?
    nocturnal animals
  • What causes people to have blurry vision?
    Their retina is too close or too far away from their cornea lens.
  • Which part of the body makes us move: bones, muscles, tendons?
    muscles
  • Nocturnal animals have __________ white in their eyes, unlike humans.
    none or little
  • Which nerves send messages from our senses to our brains?
    sensory nerves
  • Describe what happens in the body step by step when a mouse sees a cat
    the mouse's eyes see the cat and send a message to the brain, the brain decides to move and sends a message to the leg muscles, the mouse runs away
  • Which nerves send messages from our brain to our muscles?
    motor/movement nerves
  • What comes next after: "the senses send messages to the brain"
    the brain makes a decision and thinks
  • What are the strings called that connect our muscles and bones?
    tendons
  • When an owl catches prey, what is the next step directly after the sensory nerves send the message from the eyes to the brain?
    the brain sends a message along the motor/movement nerves to the muscles
  • What would happen if we didn't have bones?
    We couldn't move and we wouldn't be able to stand up.