Nervous System

What is the main function of the nervous system?

• To digest food

• To detect and respond to the environment

• To circulate blood

• To store energy

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Which part of a neuron carries signals away from the cell body?

• Axons

• Nucleus

• Dendrites

• Cell membrane

What is the protective layer around some axons called?

• Cell wall

• Synapse

• Myelin sheath

• Nerve bundle

How do neurons communicate with each other?

• Through electrical wires

• By sharing axons

• Using neurotransmitters at synapses

• Through direct contact

What is a reflex arc?

• A muscle contraction

• A part of the brain

• A network of neurons responding to a stimulus

• A type of neuron