Nervous System & Neural Signaling

1. Explain the role of the nervous system in animals.

2. What is meant by the terms sensory input, integration, and motor output with respect to the nervous system?

3. What is the functional unit of the nervous system? List three structures that are present in most neurons.

4. What is the common roles of supporting cells of the nervous system (e.g. Schwann cells, oligodendrocytes...) and how do they function in the blood brain barrier?

5. What are the functional differences between sensory neurons, interneurons, and motor neurons?

6. What is a reflex? Draw a simple reflex arc.

7. Ganglia and nuclei both contain cell bodies. Why do they have different names?

8. What are the major intracellular and extracellular cations?

9. Describe how an impulse is generated in a neuron.  Use the following terms in your description

10. Describe how an impulse propagates (travels) down the axon of a neuron. 11. How do excitable cells (i.e. nerve, muscle) communicate with each other?

12. List the differences between electrical and chemical synapses.

13. Why are neurotransmitters important?

14. Draw a chemical synapse

15. What is released from a pre-synaptic neuron at the axon terminal?

16. What structures are present on the post-synaptic membrane that permit communication to occur?

17. Explain the phrase “ integration occurs at the cellular level”

18. What are some examples of different types of nervous system organization?

19. In vertebrates, the nervous system is organized into the central nervous system and the peripheral nervous system.  What are the sub-divisions of each system?

20. What is (are) the difference(s) between

21. Name some of the important functions of the brain stem, diencephalon, cerebellum, and cerebrum.