Unit 3: The Nervous System

What is the skeletal system made up of?

• Muscles

• Nerves

• Bones

• Skin

How many nerves are in the human body?

• A thousand

• Ten thousand

• A million

• A billion

What helps you move your bones?

• Nerves

• Muscles

• Skin

• Blood

Why do you pull your hand away quickly when you touch something hot?

• Because you like the feeling.

• Because your nerves send a message to your brain.

• Because it makes you sleepy.

• Because it makes you laugh.

What system in the body is responsible for sending signals to the brain?

• Digestive system

• Nervous system

• Respiratory system

• Circulatory system

What travels along the nerves to the brain?

• Blood

• Air

• Signals

• Food

What are the nerves in your body made up of?

• Blood cells

• Muscle cells

• Nerve cells

• Bone cells

What are the long stringy parts that lead away from the cell body called?

• Axons

• Synapses

• Dendrites

• Neurons

What happens when a nerve wants to send a message to your brain?

• It sends the message through blood

• It sends the message through muscles

• It sends the message out along the dendrites

• It sends the message through bones

What is a single nerve made up of?

• One nerve cell

• Many nerve cells

• One muscle cell

• Many muscle cells