18 LABORATORY LESSONS IN GENERAL SCIENCE 



2. What is the nature of perspiration ? What is meant 

 by a secretion ? 



3. What relation is commonly noted between the tem- 

 perature of the body and the amount of perspiration ? 



4. State clearly and somewhat in detail the natural pro- 

 vision that has been made to avoid excessive temperatures 

 in the body. What is the apparent relationship between 

 excess of heat in the body, amount of perspiration, and the 

 disposal of this heat by vaporization? 



5. What care should be given the skin that it may be 

 in condition to regulate body temperature? How do we 

 protect the body from sudden extreme temperature changes ? 

 Why is there danger in wearing wet clothing ? 



6. In what ways has man provided against excessive loss 

 of body heat by radiation to the surrounding air? Why is 

 there risk to health by exposure of neck and chest in cold 

 weather? Why should a person wear rubbers in wet 

 weather ? 



7. What is likely to be true of the temperature in any 

 organ or part of the body (a) where the blood vessels are 

 continuously gorged with blood ; (b) where for any cause 

 excessive oxidation is taking place? How is the weight of 

 the body affected by a combination of excessive oxidation 

 and impaired digestion ? 



