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.

In Activity 2, which of the following responded to a chemical stimulus?  Use your data chart to answer.

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.

In Activity 5, when the interval between the stimuli decreases, _______.

What type of sensory receptor would have responded to the light stimulus?

Activity 7:  The squid utilizes a very large-diameter, unmyelinated axon to execute a rapid escape response when it perceives danger.  Due to the large-diameter, the velocity of the action potential is [a] that of a smaller diameter axon, because the larger fiber has less internal resistance to local current.  This allows a greater flow of ions in a set time bringing adjacent areas of the membrane to threshold, allowing a [b] conduction velocity of action potentials and a rapid escape response. This helps compensate for the lack of myelin.

Establishing the ion gradients (sodium and potassium) responsible for the resting membrane potential requires energy through the use of the _______.

An example of a stimulus modality as tested in this experiment (Activity 2) is ________.  Use the exact terminology from the Lab Manual and Activity 2 Data Chart.  Use one word and correct spelling is needed for credit.  

Activity 2: Graded potentials [x].

The threshold stimulus for the second action potential [x] as the interval between stimuli decreased because generation of the action potential requires a [y] stimulus during the [z] refractory period.