Lipid Biosynthesis and Fat Storage in Animals

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Where are fatty acids broken down to acetyl-CoA?

Inside the mitochondria

What is the average fat stores in a young adult human's body?

15–20 kg (33–44 lb)

Where is most of the glycogen stored in the human body?

Locked inside the skeletal muscles

What happens to the 100 g (0.2 pound) of glycogen stored in the liver after one day of starvation?

<p>It is depleted</p> Signup and view all the answers

Where are fatty acids synthesized from acetyl-CoA?

<p>Outside the mitochondrion, in the cytosol</p> Signup and view all the answers

Where does the majority of lipid digestion begin?

<p>Stomach</p> Signup and view all the answers

Why is the stomach not capable of efficiently cleaving triacylglycerols?

<p>Triacylglycerols tend to aggregate and the lipases can only hydrolyze them at the surface</p> Signup and view all the answers

What role do bile acids and bile salts play in lipid digestion?

<p>They break up lipid aggregates into smaller micelles</p> Signup and view all the answers

Which enzymes are produced in the pancreas for lipid digestion?

<p>Pancreatic cholesteryl ester hydrolase, pancreatic lipase, and phospholipases</p> Signup and view all the answers

How does the small intestine force the dispersion of lipid aggregates?

<p>Through mechanical action of its muscles</p> Signup and view all the answers

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