Nervous System Overview

What is an neurotransmitter?

• the chemical released at the end of an axon terminal

• an electrical signal that travels down the cell membrane of a neuron

• an electrical signal that travels down the cell membrane of a nerve

• a stimulus that causes the neuron to get excited

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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

What are the 2 major divisions of the peripheral nervous system (PNS)?

• Sensory & Motor
• Peripheral & Central
• Somatic & Autonomic
• Brain & Spinal Cord

What is the purpose of the myelin sheath on the axon?

• To maintain temperature
• To improve conductivity
• To protect the axon
• To release neurotransmitters

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 is NOT part of the peripheral nervous system (PNS)?

• axons
• sensory receptors
• spinal cord
• motor neurons

a signal molecule that transmits nerve impulses across synapses

• neuron
• neurotransmitter
• nerve
• action potential

part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

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Location at which a neuron can transfer an impulse to another cell with the use of neurotransmitters is called __________.

• myelin sheath
• axon
• threshold
• synapse

The part of the neuron that takes information away from the cell body is called a(n) _____________.

• dendrite
• axon
• cell body
• Schwann cell

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