1 84 How a Cofnplex Aii'mial Uses Food unit iv 



Questions 



1. What are the two uses of food in all living things? 



2. What is the original source of all foods eaten bv man? Explain. 



3. In what two different ways can the word "food" be used? 



4. Discuss how people get along without a knowledge of foods. 



5. What energy change occurs in the oxidation of food? What is the 

 unit of measure for temperature? What is the unit of measure for 

 heat? How much heat does a Calorie represent? 



6. What facts are obtained by the use of a calorimeter? 



7. How do physicians determine your minimum energy output? What 

 is meant by metabolism? By basal metabolism? How does the basal 

 metabolism of men and women, old people and young people, differ? 



8. An average-sized man doing sedentary work needs 2500-2700 Cal- 

 ories per day. Explain how this figure is obtained. Compare the en- 

 ergy needs of people of your age with the energy needs of adults. 

 When should Calorie tables be consulted? 



9. Why should we not depend on fat, the most efficient fuel food, for 

 our chief source of energy? Which food compound is used largely 

 for energy release in the body? 



10. Why are the proteins of animal foods better for us than plant pro- 

 teins? Which plant proteins are good substitutes? 



11. What does the body do with carbohydrates and fats not used in 

 oxidation? 



12. Of what special use to the body are calcium, phosphorus, iron and 

 iodine? Of which minerals are we likely to have a shortage in our 

 diet? For what purposes is water used in the diet? 



13. Give examples of roughage. Of what advantage may it be to you? 



14. What has long been known about the disease called scurvy? About 

 beriberi? 



15. Explain the object, the method, the observations, and the conclusions 

 of Eijkman's famous experiments. Who named the substance extracted 

 from rice polishings? What was it called? 



16. How was vitamin A discovered? What serious disease is caused by 

 lack of vitamin A? 



17. What is meant by deficiency diseases? What facts must we all know 

 about the various vitamins? 



18. In what part of the body is vitamin A made? From what is it made 

 in the body? What are the best food sources of vitamin A? How 

 does the lack of vitamin A affect us? 



19. What do we now call the vitamin that prevents beriberi? What are the 

 early symptoms of an insufficient amount of this vitamin? Name the 

 four best sources of thiamin or B^. Name seeds of plants which serve 

 as food for man. Why are seeds good food for us? Which disease is 

 caused by a deficiency of niacin? Which foods are good sources of 

 niacin? 



