CHAPTER 11

FUNDAMENTALS OF THE NERVOUS SYSTEM AND NERVOUS TISSUE

1. Explain how the nervous system codes for different stimuli intensities. 

2. From lecture define the refractory period.

3. Discuss the factors that influence the rate of impulse transmission along a neuron.  Define saltatory conduction. 

4. Explain the importance of myelin sheaths as they relate to the symptoms of multiple sclerosis.  You will not be tested on A,

5. B, and C fibers. 

6. Explain why cold or pressure can cause numbness.

7. Describe the anatomy of a synapse.  You will not be tested on electrical synapses. 

8. Explain how information is transferred from one neuron to another across a chemical synapse.  Explain how the neurotransmitter "message" is stopped (you will not be tested on mechanisms # 2 or # 3).

9. Distinguish among action potentials, excitatory postsynaptic potentials, and inhibitory postsynaptic potentials. 

10. Describe summation by the postsynaptic neuron.  You will not be asked to differentiate between temporal and spatial summation.

11. Briefly define neurotransmitter and state the action of acetylcholine, endorphin, and enkephalin.

12. Identify the following and state their function and location.  You do not need to state the function of structures signified by *

neuron

          cell body

                   nissl bodies

          processes*

                   axon

                   dendrite

          axoplasm*

Schwann cell*

          neurilemma*

          myelin sheath

node of Ranvier