Blog

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

Botulinum blocks [a] release from axon terminals and is used for cosmetic purposes because it [b] muscle and [c] the appearance of wrinkles. Note: this is a question that addresses the application of some of the concepts you have been studying and you may have to research the topic.

Activity 8:  When stimulus intensity increases, 

Which of the following is true of the response of a sensory neuron to the appropriate sensory stimulus?

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.

In Activity 2, which of the following was able to detect pressure?

In Activity 2, increasing the strength of the stimulus applied to the sensory receptor increased _______.

Increasing the voltage beyond the threshold stimulus voltage resulted in which of the following?

Resting membrane potential did not change with decreased extracellular Na+  because the membrane has [x] Na+ leak channels than K+ leak channels and therefore changing Na+ concentrations has [y] effect on membrane potential.

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.