Unit 1 Lesson 5 Nervous System

What is the main function of nerves in the body?

• To transmit signals between different parts of the body and the brain.

• To digest food.

• To pump blood.

• To produce hormones.

What are nerves made up of?

• A series of nerve cells

• Blood cells

• Muscle fibers

• Bone tissue

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What happens if a signal that reaches the gap between nerve cells is strong enough?

• It gets transmitted across the gap to the next nerve cell.

• It stops moving.

• It turns into a hormone.

• It disappears.

When a signal is sent through the body, which two major parts of the body receive and respond to the signal?

**THERE IS MORE THAN ONE CORRECT ANSWER**

• The brain

• The cells

• The heart

• The spinal cord

What is the basic function of nerves in the body?

• To store energy

• To take in signals and pass them between nerve cells

• To produce red blood cells

• To filter waste from the blood

How does the brain respond to signals received from the nerves?

• By ignoring them

• By sending signals back out to the body

• By storing them for later use

• By turning them into sound

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Which of the following is an example of a process controlled automatically by nerve cells?

• Writing your name

• Blinking your eyes

• Smelling a flower

• Listening to music

Different nerve cells work to perform different function. Which of the following is NOT a function of the nerve cells?

• Transmits messages from the brain to the muscles, causing movement

• Involuntarily controls your heart beat and breathing

• Respond to senses such as light, sound, taste and heat.

• Respond to fight disease and infections in your body.

How does the structure of a nerve cell (its shape) help it perform its function?

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