Introduction to Nervous System

The main function of the nervous system is

• to transport materials through the body

• to exchange oxygen and carbon dioxide

• to break apart your food so you can absorb the nutrients/macromolecules in it

• to control and coordinate all the body systems

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The cells of the nervous system are called...

• nuclei

• neurons

• stimuli

• lymphocytes

How are messages sent in the nervous system?

• chemical

• photosynthesis

• electric and chemical

• electric

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The chemicals that float across the synapse are called

• lymphocytes

• neurotransmitters

• macrophages

• hormones

The three types of neurons are (choose all that apply)

• muscle neuron

• sensory neuron

• motor neuron

• interneuron

If you step on a tack which type of neuron sends the information to the brain? _____________________

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What are the neurons called that the brain is made up of which interpret what happened? ____________________

Which type of neuron carries a message away from your brain to your leg muscles that causes your foot to rise? ___________________________

Which part of the neuron picks up a signal and turns it to an electric signal?

• dendrites

• cell body

• axon

• synapse

The _____________________________ insulates the axon to speed up the signal.

• dendrites

• myelin sheath

• synapse

• cell body