Why is it necessary for healthy vegetarians to combine different plant foods or eat some eggs or milk products?a. to make sure they obtain sufficient caloriesb. to provide sufficient vitaminsc. to make sure they ingest all essential fatty acidsd. to provide all essential amino acids for protein synthesis

If you put the following events in the order they occur in the human digestive system, the third event in the series would bea. Cells in gastric pits secrete protons.b. Pepsin activates pepsinogen.c. HCl activates pepsinogen.d. Partially digested food enters the small intestine.

After surgical removal of the gallbladder, a person might need to limit his or her dietary intake ofa. starch.b. protein.c. sugar.d. fat.

Which of the following statements is false?a. A healthy human has enough stored fat to supply calories for several weeks.b. An increase in leptin levels leads to an increase in appetite and weight gain.c. The interconversion of glucose and glycogen takes place in the liver.d. After glycogen stores are filled, excessive calories are stored as fat, regardless of their original food source

Why is oral rehydration therapy with a solution of sodium chloride and glucose an effective treatment for dehydration?a. The sodium and glucose decrease urine output.b. The sodium and glucose facilitate water absorption by the small intestine.c. The sodium and glucose help kill intestinal bacteria.d. The sodium and glucose make the person thirsty.

Why is it important that the small intestine has a much greater surface area than the stomach or esophagus?

A peanut butter and jelly sandwich contains carbohydrates, proteins, and fats. Describe what happens to the sandwich when you eat it. Discuss ingestion, digestion, absorption, and elimination.

Use the Nutrition Facts label to the right to answer these questions: Each gram of fat supplies 9 Calories. Based on the grams of saturated fat and its % Daily Value, calculate the upper limit of saturated fat (in grams and Calories) that an individual on a 2,000-Calorie/day diet should consume.

Use the Nutrition Facts label to the right to answer these questions: Is this product a good source of vitamin D and calcium? Explain.