Activity 8:  When magnesium was added to the extracellular solution, _______.

When you burn your finger on a hot stove, you fell sharp, immediate pain, which later becomes slow, throbbing pain. These two types of pain are carried by different pain neurons.  The sharp immediate pain is the result of action potentials propagated along , , Type fiber neurons, while the slow, throbbing pain is transmitted via , , Type neurons.

The release of neurotransmitter occurs _______.

In Activity 3, a weak, subthreshold stimulus will result in _______.

How does the degree of mylenation affect conduction velocity?

An action potential is an “all or none” event.  What is meant by the phrase?  Use the data in your chart to support your explanation.  Be specific and be brief. 

The electrochemical gradient is a combination of an ion’s concentration gradient and ____.

If a graded receptor potential made the resting membrane potential of the axon more negative (for example from -70 mV to -74 mV), one would expect:

Activity 3:  The minimum voltage that is required to generate an action potential is called the _______.

How is axon diameter usually related to action potential conduction velocity?