224 THE HUMAN BODY AS A MACHINE 



Questions 



1. What is the purpose of a nervous system ? 



2. What senses do you consider the most important in a 

 frog ? In man ? Why ? 



3. Why are the bones in the hind leg of a frog so differ- 

 ently arranged and shaped than the legs of man ? 



4. Why cannot a frog jump backwards ? 



5. Distinguish between voluntary and involuntary muscles. 



6. Why is a slow walk of little value as exercise ? 



7. What is the effect of tobacco on muscles ? 



8. Why should one who works to excel in athletics abstain 

 from the use of alcohol ? 



9. How is bodily heat produced ? 



10. Explain how and why the muscles should be exercised. 



11. Why do many people have round shoulders ? 



12. Why are some forms of exercise better than others ? 



13. What is flesh ? 



14. Why is exercise in the open air best ? 



15. Why is strict training necessary for success in athletics ? 



16. What is tetanus ? 



17. What is the difference between a break and a sprain ? 



18. Explain how to care for broken bones. 



19. Why avoid heavy strains on the bones of the young ? 



20. How treat a sprain ? A break ? 



21. What is the dislocation of a bone ? How treat it ? 



22. Show on the arm of another pupil just how you would 

 treat a fracture, pending the arrival of a surgeon. 



23. Why are low desks injurious to the young ? 



24. Why should deformities be corrected in youth ? 



25. How can you tie a knot in a bone ? 



26. Why is the shoulder more often dislocated than the hip ? 



27. May high pillows be injurious ? How ? 



28. Should young children be urged to walk early ? Explain. 



29. What is the use of cartilage ? What is marrow ? 



