Chapter 7 Nervous System Review
Brain
Spinal Cord
Sense Organs
Nerve Cell
Nerve
controls everything your body does, sends and
receives messages
sends messages from the body to the brain, and
from the brain to the body
gather information from the outside of your body,
and sends messages to your brain
sends messages to and receives messages from
other nerve cells
bundle of nerves cells that send and receive
messages
2. Three Main Parts of the Brain:
Grey part: receives messages from sense organs, tells muscles what to do, stores memories, controls
thinking and reasoning
Red part: coordination and balance
Green part: controls muscles for breathing, sneezing, coughing, digestion, heart rate
3. Reflexes are important because they let your body respond immediately and automatically to
something dangerous without you thinking about.
4. If you didn’t have nerves running from your feet to your brain and you stubbed your toe, you
wouldn’t feel pain, but you might fracture or break your toe. You could fall because if your brain doesn’t
receive the message that you stubbed your toe, your brain wouldn’t be able to send a message to your
eyes to look at the rock.