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1. Where does the chemical digestion of starch begin?
 
 
 
 

Question 1 of 6

2. Which of these is involved in the chemical digestion of protein?
 
 
 
 

Question 2 of 6

3. Where are most fat-digesting enzymes produced?
 
 
 
 

Question 3 of 6

4. Which of these nutrients is absorbed mainly in the duodenum?
 
 
 
 

Question 4 of 6

5. Critical Thinking: Explain the role of bile salts and lecithin in the emulsification of lipids (fats).

Question 5 of 6

6. Critical Thinking: How is vitamin B12 absorbed?

Question 6 of 6