Chapter Twenty Five Lipid Metabolism Lipids contd CO

Chapter Twenty Five Lipid Metabolism

Lipids cont’d CO 25. 1 © Ron Sanford / CORBIS Copyright © Houghton Mifflin Company. All rights reserved. 2

Lipids cont’d ← Fig. 25. 1 In a fatty acid micelle, the hydrophobic chains of the fatty acids and monoacylglycerols are in the interior of the micelle. Copyright © Houghton Mifflin Company. All rights reserved. 3

Lipids cont’d → Fig. 25. 2 Chylomicron, a type of lipoprotein Copyright © Houghton Mifflin Company. All rights reserved. 4

Lipids cont’d Fig. 25. 3 The events that must occur before triacylglycerols can reach the bloodstream through the digestive process. Copyright © Houghton Mifflin Company. All rights reserved. 5

Lipids cont’d → Fig. 25. 4 Structural characteristics of the adipose cell. Copyright © Houghton Mifflin Company. All rights reserved. 6

Lipids cont’d ← Fig. 25. 5 Hydrolysis of stored triacylglycerols in adipose tissue is triggered by hormones that stimulate c. AMP production with adipose cells. Copyright © Houghton Mifflin Company. All rights reserved. 7

Lipids cont’d → Fig. 25. 6 Fatty acids are transported across the inner mitochondrial membrane in the form of acyl carnitine. Copyright © Houghton Mifflin Company. All rights reserved. 8

Lipids cont’d ← Fig. 25. 7 Reactions of the fatty acid spiral for an 18: 0 fatty acid. Copyright © Houghton Mifflin Company. All rights reserved. 9

Lipids cont’d → CC 25. 1 The initial stages of exercise are fueled primarily by glucose; in later stages, triacylglycerols become the primary fuel. Adam G. Sylvester / Photo Researchers Copyright © Houghton Mifflin Company. All rights reserved. 10

Lipids cont’d ← Fig. 25. 8 Ketogenesis involves the production of ketone bodies from acetyl Co. A. Copyright © Houghton Mifflin Company. All rights reserved. 11

Lipids cont’d → Fig. 25. 9 The pathway for utilization of acetoacetate as a fuel. Copyright © Houghton Mifflin Company. All rights reserved. 12

Lipids cont’d ← Fig. 25. 10 The citrate-malate -pyruvate shuttle system for transferring acetyl Co. A from a mitochondrion to the cytosol. Copyright © Houghton Mifflin Company. All rights reserved. 13

Lipids cont’d → Fig. 25. 11 Cycles of fatty acid biosynthesis pathways Copyright © Houghton Mifflin Company. All rights reserved. 14

Lipids cont’d ← Table 25. 1 Copyright © Houghton Mifflin Company. All rights reserved. 15

Lipids cont’d ← Fig. 25. 12 The sequence of cycles needed to produce a C 16 fatty acid from acetyl ACP. Copyright © Houghton Mifflin Company. All rights reserved. 16

Lipids cont’d Fig. 25. 13 Overview of the biosynthetic pathway for cholesterol synthesis. Copyright © Houghton Mifflin Company. All rights reserved. 17

Lipids cont’d CC 25. 2 Copyright © Houghton Mifflin Company. All rights reserved. 18

Lipids cont’d CAG 25. 1 Copyright © Houghton Mifflin Company. All rights reserved. 19

Lipids cont’d ← Fig. 25. 14 Biosynthesis relationships among steroid hormones. Copyright © Houghton Mifflin Company. All rights reserved. 20