Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 3, Problem 2ITD
Summary Introduction

To review:

The diet group having highest LDL (low-density lipoprotein) to HDL (high-density lipoprotein) ratio. The results of the study are shown in the table given below:

Effect of Diet on Lipoprotein levels (mg/dL or milligram per deciliter)
cis Fatty acids Trans Fatty acids Saturated Fats Optimal level
LDL 103 117 121 <100
HDL 55 48 55 >40
LDL-to-HDL ratio 1.87 2.43 2.2 <2

Introduction:

Lipoproteins are made up of proteins and lipids. These molecules help in the transportation of lipids (mainly cholesterol) in the blood or extracellular fluid. The phospholipids are present on the exterior while other lipids lie in the interior. Phospholipids are oriented in such a way that the hydrophilic part is on the outer side while the hydrophobic part is on the inner side.

On basis of density, lipoproteins are classified as Ultra Low-Density Lipoproteins (ULDL), Intermediate Density Lipoproteins (IDL), Very Low-Density Lipoproteins (VLDL), LDL, and HDL. The LDL and HDL are of clinical importance and are classified as bad cholesterol and good cholesterol, respectively.

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