202 KEVIEW QUESTIONS 



19. Why should plants not be kept in the bedroom at night? 

 Is the same thing true in the daytime? Explain. 



20. Muscular exercise is a source of heat. Why can not fever 

 be produced by muscular exercise? 



21. Why does fanning a wet object help to dry it? 



22. How does it happen that too much exercise and too little 

 exercise affect the body in the same way? 



23. What change takes place in a man's body as he ascends in 

 a balloon? 



24. Why does watering the lawn make one feel cooler in 

 summer ? 



25. Is there any physiological process in man comparable to 

 regeneration in starfish? Think carefully. 



26. How does it happen that warm-blooded animals have a 

 constant temperature? 



27. Give an argument against the idea that food is in the 

 body as soon as it is swallowed. 



28. Is the curdling of milk comparable to any physiological 

 process ? 



29. Describe the interdependence of plants and animals. 



30. Why does blood collect in the finger when a band is 

 tied around it? 



31. Why does the foot of the cro'ssed knee jerk if the knee is 

 struck ? 



32. What causes fever? 



33. Show how the sexual reproduction of Vorticella is a con- 

 necting link between the conjugation of a simple form like the 

 Paramecium and the fertilization of more highly developed forms 

 like the sea urchin. 



34. Show the relation between chemical action and human 

 physiology by reference to the waste and repair of the body. 



35. How is heat produced in the bodies of plants and animals? 



36. Trace the development of the digestive system, using for 

 examples the hydroid, jellyfish, starfish, earthworm, clam. 



37. Show how the characteristic movements of animals are 

 dependent on their structure, using for examples the ameba, 

 jellyfish, lobster, fly. 



38. Show the connection between muscular exercise and other 

 functions of the body, particularly circulation and respiration. 



39. Explain the position of the diaphragm when relaxed. 



