Ch 12_Protein

[Audio] The third food substance that you need to know is proteins. The food that are rich in proteins are cheese, eggs, milk, tofu, beans & peas, fish and meat, nuts and mushroom..

[Audio] What are the key functions of proteins? Firstly, it can be used as raw materials for the growth and repair of body tissues, e.g. hair, skin and muscles. Secondly, it can be used to make enzymes, antibodies and some hormones. Thirdly, it can be used as energy sources for body functions..

[Audio] If your body does not have enough intake of proteins, you may suffer from deficiency disease called Kwashiorkor. If the person has got Kwashiorkor, he will have weak muscles and swollen abdomen. It is more common in children..

[Audio] How is protein formed? Amino acids are the building blocks of proteins. They join to form long chains called polypeptides. The polypeptides join together by coiling to form protein..

[Audio] The fourth substance that you are going to learn is minerals. Minerals and vitamins have no energy value. Our body needs them in small amounts. It is important for regulating the reactions in cells or building up body tissues..

[Audio] The first type of common minerals in the food is called calcium. It keeps our bones and teeth strong..

[Audio] If the body lacks the calcium, rickets will occur. It gives rise to soft and weak bones. When you take a look on the photos, you can see the bending of the legs of the child..