Neural Anatomy and Action Potential

Part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

What number(s) on the graph represents the Resting Potential?

• 1 and 2
• 1 and 5
• 2 and 3
• 3 and 4

Which ions are involved in the electrical nerve impulse?

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

Tags

NGSS.HS-PS1-2

NGSS.HS-PS2-5

What number on the graph represents the Depolarization phase?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS3-5

Why is -55 mV a significant number?

• This is the largest charge achieved during an action potential
• This is the threshold required to complete an action potential
• This is the resting charge of a neuron
• This is the charge when all the sodium is inside the cell

At what stage does Potassium end outside the neuron, and Sodium ends inside the neuron?

• Depolarizarion

• Repolarization

• Hyperpolarization (refractory period)

• Resting Potential

At what stages do Sodium/Potassium Channels open?

• Repolarization/ Repolarization

• Depolarization/ Hyperpolarization (refractory period)

• Hyperpolarization (refractory period)/ Repolarization

• Depolarization/ Repolarization

Which is the correct order of events in depolarisation then repolarisation? 

• Sodium channels close, potassium channels open
• Sodium channels open, potassium channels open, 
• Sodium channels open, potassium channels close
• Potassium channels open, sodium channels open

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

Which one of the following is involved in maintaining a resting membrane potential?

• Na+/K+ ATPase pump moves 3Na+ in for every 2K+ out

• Na+/K+ ATPase pump moves 3K+ in for every 2Na+ out

• Na+/K+ ATPase pump moves 3Na+ out for every 2K+ in

• Na+/K+ ATPase pump moves 3K+ out for every 2Na+ in