Name: Date: Period:

Nerve Cells Outline (N-2A)

Read pages 465-467 of Middle School Life Science (Kendall/Hunt) and fill in this outline.

  1. Nervous System: A control system made up of the ____________ , ____________ , and ____________ .
    1. Creates actions such as ____________ and ____________ .
    2. Receives ____________ from the outside of the body.
      1. Stimuli are ____________ or ____________ that cause an organism to react, sending ____________ messages to parts of the body, causing them to respond.
    3. Nervous system is made up of ____________ .
      1. ____________ are ____________ cells that send electrical messages.
      2. The central part of a neuron is called a ____________ , off of which many ____________ extend.
      3. The shorter fibers are called ____________ .
      4. The single long fiber on the other side is called an
        ____________ .
        1. ____________ carry messages to the cell body.
        2. ____________ carry messages away from the cell body.
        3. These messages are called ____________ .
        4. Axons and dendrites are covered by a ____________ to prevent ____________ from jumping.
    4. ____________ is the space between two neurons that the impulse is sent through.
      1. Impulses move when ____________ are released from the end of the ____________ that move across the synapse to the dendrites of the next nerve cell.
    5. Neurons vary in ____________ , ____________ , number of ____________ , and ____________ size.
    6. There are three kinds of neurons.
      1. ____________ neurons carry impulses from ____________ the body to the spinal cord or brain.
      2. ____________ neurons carry impulses from the spinal cord or brain to the ____________ .
      3. ____________ neurons inside spinal cord and the brain. These link ____________ and ____________ neurons.

    NEXT, complete the review questions on page 467,
    in complete sentences.
    (Please staple together this outline and your answers to the review questions.)