THE NERVOUS SYSTEM 245 



QUESTIONS ON THE TEXT 



I. What have we learned in preceding chapters to show that all 

 parts of the body work together in harmony? 2. How may the 

 nervous system be compared to a telegraph system? 3. Of what 

 is nerve tissue made up? 4. Describe nerve cells. 5. Describe 

 the structure of nerve fibers. 6. What simple experiment illustrates 

 the structure of a nerve? 7. What is the general arrangement of the 

 nervous system? 8. Of what does the brain consist? 9. What are 

 the most important functions of the brain? 10. What can you say 

 about the weight of the brain? 



II. What are the three principal parts of the brain? 12. Describe 

 the cerebrum. 13. Describe the cerebellum. 14. What is the medulla 

 oblongata? 15. What are cranial nerves? 16. Describe the spinal 

 cord. 17. What is reflex action? 18. Give some familiar illustra- 

 tions of reflex action. 19. How does reflex action give relief to the 

 brain ? 20. Describe the spinal nerves. 



21. What is the sympathetic nervous system? 22. State briefly 

 how the sympathetic system acts. 23. By what apparently slight 

 causes may the health of the nervous system be disturbed? 24. How 

 may the brain power be increased ? 25. What is the effect of worry 

 on the nervous system ? 26. What can be said about the importance 

 of sleep? 27. Give some practical points about sleep. 28. What 

 are some of the first effects of alcoholic liquors upon the nervous 

 system? 29. Show how the power of self-control is weakened by 

 strong drink. 30. What are some of the progressive changes in 

 character caused by alcoholic liquors ? 



31. What are some of the final results of alcoholism? 32. What 

 is the moral effect of the alcohol habit? 33. What may be the 

 hereditary results of strong drink ? 34. State in a general way the 

 effect of tobacco upon the nervous system. 35. What is the effect of 

 tobacco upon the physical health of young people ? 36. How may 

 tobacco retard the mental development of young students ? 37. What 

 is opium, and what are some of its various forms? 38. What is 

 meant by the opium habit? 39. What is chloral and what is the 

 chloral habit? 40. Mention some other dangerous drugs and give 

 some precautions about their use. 



