Food storage at freezer and refrigerator temperatures will ...

[laurencescou]

Food storage at freezer and refrigerator temperatures will prevent microbial food poisoning, but caution is needed since _____.
  1.yeasts and molds grow in the refrigerator and the freezer
  2.foods will eventually rot in the refrigerator and freezer
  3.pathogen growth is masked by refrigerator and freezer storage
  4.pathogenic bacteria survive freezing, and can grow if the food is warmed to ambient temperatures
  5.frozen foods can cause microbial food poisoning

Question 2

Using bread as an example, describe the tasks of the various body systems in breaking down carbohydrate into glucose to fuel the cells' work.

[juicepod]

Answer to Question 1

4

Answer to Question 2

The various body systems must make glucose available to the cells, not all at once when it is eaten but at a steady rate all day. The largest of the digestible carbohydrate molecules, starch, requires the most extensive breakdown. Disaccharides, in contrast, need be split only once before they can be absorbed. The digestive system must first render the starch and disaccharides from the food into monosaccharides that can be absorbed through the cells lining the small intestine. The conversion of a bite of bread to nutrients for the body is completed when monosaccharides cross these cells and are washed away in a rush of circulating blood that carries them to the waiting liver. The absorbed carbohydrates (as monosaccharides: glucose, galactose, and fructose) travel in the bloodstream to the liver, which can convert fructose and galactose to glucose. The circulatory system transports the glucose and other products to the cells. Liver and muscle cells store circulating glucose as glycogen; all cells then split glucose for energy.

[laurencescou]

Excellent

[mcarey591]

Gracias!