What is the role of protein in the body?

The role of protein in the body is primarily to create enzymes and hormones, and to repair tissues. Proteins are made up of amino acids, which are essential for the body's growth, development, and overall health. Enzymes, which are proteins, catalyze biochemical reactions, facilitating processes such as digestion and metabolism. Hormones, many of which are also proteins, regulate various physiological activities, including metabolism and the body's response to stress.

In addition to these functions, proteins play a crucial role in the repair and maintenance of tissues. After exercise, for example, protein helps to repair muscle fibers that may have been damaged, enabling recovery and growth. This is why athletes and individuals engaged in regular physical activity are encouraged to consume an adequate amount of protein.

The other options, while related to bodily functions, do not accurately reflect the primary roles of protein. Immediate energy during exercise is predominantly supplied by carbohydrates and fats, hydration is managed mainly through water, and body temperature regulation involves a combination of physiological mechanisms, including those facilitated by other macronutrients but not primarily proteins.