Question

1. Most digestion of fat occurs in the small intestine. Name the 4 agents found there, indicate where they come from, and describe what they do?

2. What is the Dietary Reference Intake for fat and saturated fat? If one was consuming an 1800 calorie diet, what is the maximum amount of total fat in grams they should have per day? What is the maximum amount of saturated fat in grams they should have?

3. What are the building blocks of protein? How many are vital to life and health? What nutrient is unique to protein (not found in carbohydrates or fats)?

4. Define complete and incomplete protein foods. What are complementary proteins? Give an example of two complementary proteins.  

5. What 3 agents in protein digestion are found in the stomach? What do they do?

6. What is the Dietary Reference Intake for protein? If a person consumed an 1800 calorie diet, how many grams of protein this per day? Show your work. (Hint these are ranges). What is the RDA for protein? Using this value, calculate the RDA for a 220 lb. person.                                                                               

Answer 1

The 4 agents in the small intestine that help in fat digestion and pancreatic lipase, bile, epithelial cells, and lacteals. Here pancreatic lipase comes from the pancreas, bile from the gall bladder, epithelial cells, and lacteals in the small intestine. Here pancreatic lipase breaks down lipid to free fatty acid and monoglyceride. Bile helps in breaking down fat into small globules. Epithelial cells absorb fatty acid and monoglyceride and convert it to triglyceride. Triglycerides bind with protein to form chylomicrons which are carried by lacteals.

Daily reference intake level of saturated and unsaturated fat combined should be between 16 to 22 gms. On can have a maximum of 180 calorie of fat per day which in gms would be 23 gms,