Briefly explain what leads to differences in muscular contractions.  

Define: Hyperpolarization vs. Depolarization Electrical Gradient

Name and briefly describe the two (2) refractory periods.  Also, give two (2) reasons why the refractory period is important.

Answer the following question regarding the resting potential:    3.      Explain the source of the resting potential.  Include in your discussion A and B above plus other forces operating to maintain -70 mV

Define: Afferent Neuron vs. Efferent Neuron All or none Law

List five (5) features of neurons

Provide the two (2) primary functions of the nervous system.

Answer the following question regarding the resting potential   2. Indicate the permeability of the membrane during the resting potential to each of the Ions present.  

Contrast: Sensory Neuron vs. Motor Neuron vs. Interneuron.

Label and Describe the main parts of a neuron.