Incorrect test questions

• If there was a bag that has very small holes in them filled with starch and saliva surrounded by water, why would sugar be found in the bag?

  The saliva broke the starch into sugar.
• In the bag (which has very small holes) filled with saliva and starch and surrounded by water, why was starch not found in the water outside the bag?

  The starch molecules are too large to pass through the tiny holes.
• Why do muscles need more blood using exercise? Give three reasons:

  • to gain more energy
  • to get rid of waste products
  • to get additional oxygen and glucose to help release the energy
• Nancy is dancing, give two ways her breathing changes when she dances:

  • the ventilation gets faster
  • more air is coming in and out of her lungs
• What is the order of how carbon dioxide is removed from the body?

  1. muscle cells
  2. bloodstream
  3. lungs
  4. trachea
  5. nose
• Why do we need joints in out skeleton?

  to help us move freely.
• Which part of our skeleton moves so that we can breathe?

  ribs
• Which part of our skeleton moves so that we can chew food?

  lower jaw