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1. What ion enters a neuron causing depolarization of the cell membrane?
 
 
 
 

Question 1 of 8

2. Voltage-gated Na+ channels open upon reaching what state?
 
 
 
 

Question 2 of 8

3. What does a ligand-gated channel require in order to open?
 
 
 
 

Question 3 of 8

4. What does a mechanically gated channel respond to?
 
 
 
 

Question 4 of 8

5. Which of the following voltages would most likely be measured during the relative refractory period?
 
 
 
 

Question 5 of 8

6. Which of the following is probably going to propagate an action potential fastest?
 
 
 
 

Question 6 of 8

7. Critical Thinking: What does it mean for an action potential to be an “all or none” event?

Question 7 of 8

8. Critical Thinking: The conscious perception of pain is often delayed because of the time it takes for the sensations to reach the cerebral cortex. Why would this be the case based on propagation of the axon potential?

Question 8 of 8