Class II

A typical brain weighs how much?
  1. 3 pounds (1.4 kilograms)
  2. 3 pounds (1.4 kilograms)
  3. 3 tons (2.7 metric tons)
  4. 3 kilograms (6.6 pounds)
This system controls everything you do:
  1. Nervous system
  2. Olfactory system
  3. Respiratory system
  4. Endocrine system
Without the nervous system, you couldn’t:
  1. Walk
  2. Breathe
  3. Think
  4. All of the above
Which part of the brain helps keep your balance so you don’t fall flat on your face?
  1. Cerebellum
  2. Medulla oblongata
  3. Pituitary gland
  4. Spinal cord
The brain creates connections, or pathways, between these microscopic cells:
  1. Blood cells
  2. Tiny cell phones
  3. Brain tissues
  4. Neurons
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