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1. Digestion of proteins begins in the ________ where ________ and ________ mix with food to break down protein into ________.
 
 
 
 

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2. Amino acids are needed to ________.
 
 
 
 

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3. If an amino acid is not used to create new proteins, it can be ________.
 
 
 
 

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4. Critical Thinking: Amino acids are not stored in the body. Describe how excess amino acids are processed in the cell.

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5. Critical Thinking: Release of trypsin and chymotrypsin in their active form can result in the digestion of the pancreas or small intestine itself. What mechanism does the body employ to prevent its self-destruction?

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