Transport of lipids in blood involve lipoproteins which includes the LDL and HDL commonly referred to as the “good and bad cholesterol” respectively. True False
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Transport of lipids in blood involve lipoproteins which includes the LDL and HDL commonly referred to as the “good and bad cholesterol” respectively.
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- Effects of Dietary Fats on Lipoprotein Levels Cholesterol that is made by the liver or that enters the body from food does not dissolve in blood, so it is carried through the bloodstream by lipoproteins. Low-density lipoprotein (LDL) carries cholesterol to body tissues such as artery walls, where it can form deposits associated with cardiovascular disease. Thus, LDL is often called bad cholesterol. Highdensity lipoprotein (HDL) carries cholesterol away from tissues to the liver for disposal, so HDL is often called good cholesterol. In 1990, Ronald Mensink and Martijn Katan published a study that tested the effects of different dietary fats on blood lipoprotein levels. Their results are shown in Figure 2.23. In which group was the level of LDL (bad cholesterol) highest?Effects of Dietary Fats on Lipoprotein Levels Cholesterol that is made by the liver or that enters the body from food does not dissolve in blood, so it is carried through the bloodstream by lipoproteins. Low-density lipoprotein (LDL) carries cholesterol to body tissues such as artery walls, where it can form deposits associated with cardiovascular disease. Thus, LDL is often called bad cholesterol. Highdensity lipoprotein (HDL) carries cholesterol away from tissues to the liver for disposal, so HDL is often called good cholesterol. In 1990, Ronald Mensink and Martijn Katan published a study that tested the effects of different dietary fats on blood lipoprotein levels. Their results are shown in Figure 2.23. Figure 2.23 Effect of diet on lipoprotein levels. Researchers placed 59 men and women on a diet in which 10 percent of their daily energy intake consisted of cis fatty acids, trans fatty acids, or saturated fats. Blood LDL and HDL levels were measured after three weeks on the diet; averaged results are shown in mg/dL (milligrams per deciliter of blood). All subjects were tested on each of the diets. The ratio of LDL to HDL is also shown. Source, Mensink RP, Katan MB, Effect of dietary trans fatty acids on high-density and low-density lipoprotein cholesterol levels in healthy subjects. NEJM 323(7):43945. An elevated risk of heart disease has been correlated with increasing LDL-to-HDL ratios. Rank the three diets according to their predicted effect on cardiovascular health.Effects of Dietary Fats on Lipoprotein Levels Cholesterol that is made by the liver or that enters the body from food does not dissolve in blood, so it is carried through the bloodstream by lipoproteins. Low-density lipoprotein (LDL) carries cholesterol to body tissues such as artery walls, where it can form deposits associated with cardiovascular disease. Thus, LDL is often called bad cholesterol. Highdensity lipoprotein (HDL) carries cholesterol away from tissues to the liver for disposal, so HDL is often called good cholesterol. In 1990, Ronald Mensink and Martijn Katan published a study that tested the effects of different dietary fats on blood lipoprotein levels. Their results are shown in Figure 2.23. In which group was the level of HDL (good cholesterol) lowest?
- Which one of the following is not a complication of elevated cholesterol level? a High density lipoproteinemia.b Myocardial infraction and thrombosis.c Artery diseases.d Atherosclerosis.A well-trained athlete is found to have a moderately increased plasma total cholesterol concentration. What additional measurements would you advise this person to take in order to gain a better understanding of the importance of the increased cholesterol? Hint: Think about the forms in which cholesterol exists in the blood.A cholesterol screening has reported Toms blood serum contains 50mg/dal HDL and 180 mg/dal LDL and a total cholesterol of 255. What is the LDL/HDL ratio? Is this value considered in the healthy range?
- Highest proportion of circulating cholesterol is foundOut of the following, cholesterol does not serve as a precursor for which compounds?a) Vitamin Db) Sex hormonesc) Bile saltsd) Bile pigmentsCarbohydrates and lipids are composed of the same chemical elements, but in different proportions. Both are used as energy sources for cell metabolism. Which type of molecule has the higher calorie content per gram. Explain..
- Which one of the following is found on cells that line the capillary wall of blood vessels adjacent to adipose tissue or muscle tissue that promotes release of fatty acids (FAs) from dietary triacylglycerols (TAGs) via hydrolysis? Chylomicrons Serum Albumin Bile Salts (Bile Acids) Prostaglandins Lipoprotein LipaseFor each of the three dietary macromolecules describe their digestion and and absorption in the bodyPlsssssssssssss helpppppppp, based on the diagram write a brief statement identifying which of the family members are most at risk for having high cholesterol
