Nervous System Part A

The nervous system is composed of the ___, ___, and ___.

• heart, brain, kidneys
• lungs, liver, stomach
• brain, spinal cord, nerves
• eyes, pancreas, veins

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

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

nerve impulse

• action potential
• resting potential
• membrane potential
• synapse

part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

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

• myelin sheath
• axon
• threshold
• synapse