Current location - Health Preservation Learning Network - Health preserving class - Teenagers are in a critical period of growth and development, and need to supplement a certain amount of protein every day. The following statement about protein's role in the human body is incorrect.
Teenagers are in a critical period of growth and development, and need to supplement a certain amount of protein every day. The following statement about protein's role in the human body is incorrect.
There are six kinds of nutrients in food: protein, sugar, fat, vitamins, water and inorganic salts, and their functions are different: protein, sugar and fat can provide energy for human body, among which protein is the basic substance that constitutes human cells, which has an important relationship with human growth and development and cell repair and renewal, and protein can also be decomposed to provide energy for human physiological activities. Therefore, teenagers in the critical period of growth and development need to supplement a certain amount of protein every day; Sugar is the most important energy-supplying substance for human body, and sugar is also a component of cells. Fat is a spare energy substance in human body, and also participates in the construction of cell membrane; Inorganic salts are important raw materials for human tissues. Water is the main component of cells, and all life activities of human body are inseparable from water. Nutrients and wastes in human body must be dissolved in water before they can be transported. Vitamins play an important role in all life activities of human body. Water, inorganic salts and vitamins do not provide energy. It can be seen that D is wrong and in line with the meaning of the question.

So choose: D.