Question
.Explain food and its functions. Explain the vicious cycle of
Answer :
Word Count : 1050
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Food is a basic human requirement essential for survival, growth and overall well-being, serving as the primary source of nutrients that sustain physiological processes and maintain health. It includes all edible substances that, when consumed and absorbed, nourish the body by supplying energy, building materials and regulatory components. Food originates from both plant and animal sources and contains nutrients such as carbohydrates, proteins, fats, vitamins, minerals and water. These nutrients work together to support bodily functions, promote growth and repair tissues, maintain metabolic activities and protect the body from diseases. The quality, quantity and balance of food consumed determine the nutritional status of an individual, making food central not only to physical development but also to psychological and social well-being. One of the primary functions of food is to provide energy. Carbohydrates, fats and proteins supply the fuel required by the body for all voluntary and involuntary activities. Carbohydrates serve as the most immediate source of energy, supplying glucose that powers the brain, muscles and various organs. Fats offer concentrated energy storage and act as a reserve when carbohydrate intake is insufficient. Proteins may also be used as an energy source, although their primary role lies elsewhere. The energy derived from food enables activities such as walking, working, digestion, circulation and thermoregulation, making sufficient caloric intake essential for survival and efficiency. Food also performs a body-building function. Proteins are the key structural nutrients needed for growth, development and maintenance of body tissues. They form the building blocks of muscles, skin, hair, nails, enzymes and hormones. Minerals such as calcium, phosphorus and magnesium aid in the formation of bones and teeth, while iron contributes to haemoglobin production. During childhood, adolescence, pregnancy and lactation, the body requires increased amounts of body-building nutrients to support rapid growth and tissue expansion. Even in adulthood, continuous repair and regeneration of tissues depend on adequate intake of proteins and minerals, highlighting the indispensable role of food in maintaining structural integrity. Regulation of
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