396 A YEAR IN SCIENCE 



9. What is the function of the medulla? 



10. Give the size and location of the spinal cord. 



11. Explain how a spinal nerve is attached to the 

 spinal cord. 



12. What is the difference in the use of the sensory 

 root and the motor root? 



13. What is the sympathetic nervous system? 



14. Trace the path of a nerve impulse in a reflex 

 action. 



15. What are the principal advantages in reflex 

 actions ? 



16. In what respects do voluntary actions differ 

 from reflex ones ? 



17. What is the physiological reason why practice 

 makes perfect? 



18. Why is it an advantage in early life to form 

 many good habits? 



19. Point out the error in thinking that we can 

 perform a certain act and then not count it. 



20. Why do we have schools ? 



21. Learn how much your education for a year costs 

 the community in which you live. Also, determine 

 how much it costs your parents to keep you in school 

 for a year. 



22. Is the education which you are receiving worth 

 that amount of money to you? 



23. Do you think that the returns which your 

 parents and the community are receiving are adequate, 

 considering the amount of money which they have 

 invested in your education? 



24. What rest and care do you give your nervous 

 svstem? 



