Introduction

1. Describe the neuron function.

2. Contrast graded potentials and action potentials.

3. a. Describe how there can be an electrical change on either side of a membrane thereby generating a membrane potential.

1. What two characteristics must a membrane possess in order to generate and maintain electrical signals critical to nervous tissue?

Membrane Transport Proteins

4. What three membrane proteins are required if a membrane is to carry electrical impulses?

5. Describe the activity of sodium and potassium ion channels.

6. How do the following differentially affect gated channels?

• Chemicals (ligands)

• Voltage changes

• Mechanical deformation

7. Where are each of the following types of gated channels located AND what type of function do they serve?

            Ligand gated –                                                                                                             

            Voltage gated –                                                                                                               

            Mechanically gated –                                                                                                      

DETAILED ASSIGNMENT

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