Proteins:
A. help maintain body temperature by providing insulation and help cushion organs and bones.
B. build and renew body tissues, provide heat energy, and help produce antibodies.
C. regulate the activity of the heart, nerves, and muscles.
D. make up most of blood plasma and account for about 60% of an adult's body weight.
E. play a vital role in almost every chemical reaction within the body.
Answer: B
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