Biomedical analysis Essay Example | Topics and Well Written Essays - 2000 words

Biomedical analysis - Essay Example Similarly, the medium fat consumers had 31% higher TG levels and high fat consumers had 60% higher TG levels compared to the low fat consumers. However, there was no significant difference in HDL concentrations in blood on the basis of dietary fat consumption. The results of the present study further showed that moderate exercise (1-2 times a week) reduces total cholesterol and TG, and increases HDL slightly, thereby reducing the risk of cardiovascular disease. The statistical analysis showed a direct relationship between cholesterol, TG and HDL levels in blood and diet/exercise. The results support the hypothesis diet and exercise affect cholesterol, high density lipoprotein and triglycerides in blood, and, consequently, could reduce the risk of cardiovascular disease. Introduction Accumulation of unnecessary fat in the abdominal region of the body is considered a risk for cardiovascular disease. The key reasons for cardiovascular disease (CVD) are lack of exercise and unchecked eat ing. ... (Marshall and Bangert, 2008). Although the term lipid is sometimes used as a synonym for fats, fats are a subgroup of lipids called triglycerides. Lipids also encompass molecules such as fatty acids diets their derivatives (including tri-, di-, and monoglycerides and phospholipids) as well as other sterol- containing metabolites such as cholesterol (Harvey, 2003). The main plasma lipids include fatty acids, triglycerides, cholesterols and lipoproteins. The fatty acids are made of a hydrocarbon chain that terminates with a carboxylic acid group this arrangement confers the molecule with a polar, hydrophilic end that is insoluble in water. The fatty acid structure is one of the most fundamental categories of biological lipids, and is commonly used as a building block of more structurally complex lipids. The carbon chain, typically between 4 to 24 carbons long, may be saturated or unsaturated, and may be attached to functional groups containing oxygen, halogens, nitrogen and sulphur. Wh ere a double bond exists, there is the possibility of either a cis or trans geometric isomerism, which significantly affects the molecule’s molecular configuration. cis- double bonds cause the fatty acid chain to bend. This effect is directly proportional to the number of double bounds in the chain. This in turn plays an important role in the structure and function of cell membranes. Most naturally occurring fatty acids are of the cis configuration, although the trans form does exist in some natural and partially hydrogenated fats and oils. (Hunter, 2006). The triglyceride (TG) molecule comprises one glycerol and three fatty acid molecules. TGs,