Mrs. Robinson Nervous System Worksheet

Label the Parts of a Neuron

• Cell Body

• Dendrites

• Axon

• Myelin Sheath

• Synapse

part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

a signal molecule that transmits nerve impulses across synapses

• neuron
• neurotransmitter
• nerve
• action potential

Which ions are involved in the electrical nerve impulse?

• Iodine and Sodium
• Potassium and Sodium
• Iron and Sodium
• Calcium and Iodine

What contains the nucleus of the neuron?

• Terminal Bouton

• Cell Body

• Axon Hillock

• Myelin Sheath

What is the insulating membrane that surrounds parts of the axon that helps to protect & propagate action potential?

• Axon
• Dendrites
• Node of Ranvier
• Myelin Sheath

Gaps in the myelin sheath are called this.

• Nodes of Ranvier
• Axon terminals 
• Synapses
• Neurotransmitters

What is structure labeled C in the picture?

• Dendrite
• Axon
• Cell Body
• Axon Terminal

Homeostasis is maintaining a ___________ internal environment.

• reliable

• different

• constant

• heated

The CNS consists of the ______ and spinal cord.