Activity 1:  The resting membrane potential became less nega…

Activity 1:  The resting membrane potential became less negative (-70 mV to – 40 mV) with increased extracellulkar K+ because [x] K+ diffused out of the cell leaving [z] K+  inside the cell.   The following drawing may be helpful in evaluating Questions 1 and 2.

Activity 6: Multiple action potentials were generated in res…

Activity 6: Multiple action potentials were generated in response to a 500 msec duration stimulus because the [a] stimulus results in stimulation during the [b]. The stimulus is [c] which is required for an action potential to be generated during the [d] phase of the action potential.

Pain-sensitive neurons conduct action potentials from the sk…

Pain-sensitive neurons conduct action potentials from the skin or teeth to sites in the brain involved in pain perception. To most effectively prevent the perception of pain a dentist would inject [a] near the [b] to [c] the generation of action potentials that would send a signal to the brain.