Proteins And Lipids

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Proteins & Lipids
Proteins are polymers of amino acids when amino acids join together in different combinations, they form proteins. there are many categories of proteins; structural, contractile, transport and hormones each protein has a different function within living organisms.
Structural proteins such as collagen and elastin are found in connective tissue. keratin is also a structural protein which creates a protective layer of skin. all proteins in the structural group are there to strengthen, support and protect within living organisms. collagen is used to build structural components of the body such as bones and cartilage. The function of collagen is to support tissues in the body and provide structure for specific types of cells known …show more content…

These proteins are chemical messengers that travel through the blood to the organs and tissues they can affect many different processes in the body, including reproduction, sexual function, metabolism, growth and development. For example, Glucagon, it is produced by Alpha cells which are found in a part of the pancreas called the islets of Langerhans. Glucagon is released in response to low glucose levels, it brings the blood glucose level high enough for the body to function well. This happens by activating liver and muscle enzymes that then convert glycogen back into glucose in a process called glycogenosis. In a case of starvation, glucagon also stimulates the formation of glucose from amino acids and fats in a process called gluconeogenesis. The overall function is to increase energy levels in the human body when it is …show more content…

Haemoglobin is an example of a transport protein, its function is to transport oxygen from the lungs to the body's tissues and then transport carbon dioxide out of the tissue back to the lungs. There are two types of haemoglobin; oxyhemoglobin and the deoxyhemoglobin. Oxyhemoglobin has a higher affinity for oxygen and the deoxyhemoglobin is more attracted to carbon dioxide. This means that the oxygen in the lungs binds to the oxyhemoglobin to be transported into the body and be absorbed. The deoxyhemoglobin picks up the carbon dioxide that is left after the body absorbs the oxygen and takes it back to the lungs to complete its

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