Lipid Biosynthesis and Fat Storage in Animals
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Questions and Answers

Where are fatty acids broken down to acetyl-CoA?

  • In the skeletal muscles
  • Inside the mitochondria (correct)
  • In the cytosol
  • In the liver

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

  • 5–10 kg (11–22 lb)
  • 10–15 kg (22–33 lb)
  • 15–20 kg (33–44 lb) (correct)
  • 25–30 kg (55–66 lb)

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

  • In the liver
  • In the adipose tissue
  • In the blood
  • Locked inside the skeletal muscles (correct)

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

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

Where are fatty acids synthesized from acetyl-CoA?

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

Where does the majority of lipid digestion begin?

<p>Stomach (C)</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 (D)</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 (C)</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 (B)</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 (D)</p> Signup and view all the answers

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