Chapter 2: Protein

Chapter 2. Protein

According to the PDCAAS scale for measuring protein quality, casein and whey are among the highest quality proteins. What is it about these proteins that make them so highly rated?

A. They contain all essential amino acids

B. The low content of branched chain amino acids

C. The low level of digestibility

D. The fast rate of absorption

Where does protein digestion begin?

A. Stomach

B. Small intestine

C. Liver

D. Pancreas

This organ releases protein-digesting enzymes (or proteolytic enzymes) into the gut and hormones into the bloodstream.

A. Stomach

B. Small intestine

C. Liver

D. Pancreas

Where does transamination occur?

A. Stomach

B. Small intestine

C. Liver

D. Pancreas

What is the main physiological difference between whey and casein proteins?

A. The amino acids from whey are slowly absorbed and released into the bloodstream, providing a continual supply of amino acids to build tissue while the amino acids from casein are rapidly released into the bloodstream, supplying an immediate source of amino acids to rebuild muscle tissue after a strenuous workout.

B. The amino acids from casein are slowly absorbed and released into the bloodstream, providing a continual supply of amino acids to build tissue while the amino acids from whey are rapidly released into the bloodstream, supplying an immediate source of amino acids to rebuild muscle tissue after a strenuous workout.

C. Though whey and casein both come from milk, the whey protein, which is the primary constituent of milk, is a higher quality protein than casein because it contains a greater proportion of essential amino acids.

D. None of the above

What happens to excess protein consumed in the diet?

A. It is transported to muscle tissues and helps to increase muscle size.

B. It is ...