Question

when is protein primarily used for energy? when lifting weights when at rest or sleeping when engaged in long - term physical activity when the diet lacks enough carbohydrate question 28 which of the following is a source of complete protein? grains beans and legumes nuts dairy products

Explanation:

1. For the first question, carbohydrates are the body's preferred energy - source. When the diet lacks enough carbohydrate, the body will start to break down protein for energy. Lifting weights mainly uses energy from stored ATP and creatine - phosphate first, then carbohydrates and fats. At rest or sleeping, the body mainly uses fats for energy. Long - term physical activity uses a combination of fats and carbohydrates primarily.
2. For the second question, a complete protein contains all the essential amino acids in the right proportions. Grains, beans and legumes, and nuts are incomplete proteins as they lack one or more essential amino acids. Dairy products are a source of complete protein.

Answer:

When the diet lacks enough carbohydrate
D. dairy products