What is the central nervous system (CNS) made of?

• brain and spinal cord
• brain and cranial nerves
• spinal cord and spinal nerves
• cranial nerves and spinal nerves

Sensory neurons carry nerve impulses from the sense organs and internal organs (like your stomach) to the

• peripheral nervous system (PNS)
• central nervous system (CNS)
• muscles
• sense organs

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What are the senses that the nervous system receives messages from? (mark all that apply)

• Vision

• Hearing

• Smell

• Taste

• Touch

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Sends impulses AWAY from CNS to muscle and glands.

• Motor Neuron

• Sensory Neuron

• Interneuron

An example of a reflex action includes

• Touching a butterfly

• Brushing your hand against the side of your body

• Touching a hot stove

• Your legs moving as you walk

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Reflex actions are important because

• They provide a quick, involuntary response

• They prevent injury

• They are essential to the survival of organisms

• All of the above

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What type of neuron is A?

• Sensory

• Inter

• Motor

What type of neuron is B?

• Sensory

• Inter

• Motor

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What type of neuron is C?

• Sensory

• Inter

• Motor

Name an effector in this diagram.

• A

• B

• D

• E

• F

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NGSS.HS-LS1-3