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Questions and Answers
Where does lipolysis occur?
Where does lipolysis occur?
- In the mitochondria of adipose cells
- In the endoplasmic reticulum of adipose cells
- In the cytosol of adipose cells (correct)
- In the nucleus of adipose cells
What is the fate of glycerol released from triacylglycerol?
What is the fate of glycerol released from triacylglycerol?
- Used almost exclusively by the liver to produce glyceraldehyde 3-phosphate (correct)
- Taken up by cells for immediate energy production
- Converted to triglycerides for storage
- Stored until needed by the body
What is the role of carnitine in fatty acid oxidation?
What is the role of carnitine in fatty acid oxidation?
- It breaks down fatty acids in the cytosol
- It converts fatty acids into triglycerides
- It helps shuttle long-chain fatty acids into the mitochondria (correct)
- It inhibits the oxidation of fatty acids
Where does the oxidation of fatty acids occur?
Where does the oxidation of fatty acids occur?
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What is the primary product of lipolysis?
What is the primary product of lipolysis?
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Study Notes
Lipolysis
- Occurs in the cytoplasm of cells
- Releases glycerol and fatty acids from triacylglycerol
Glycerol
- Transported to the liver for gluconeogenesis, the synthesis of glucose
- Can also be used as a source of energy by some tissues
Carnitine
- Transports long-chain fatty acids across the mitochondrial membrane into the matrix for beta-oxidation
Beta-Oxidation of Fatty Acids
- Takes place inside the mitochondria of cells
- Results in the breakdown of fatty acids into acetyl-CoA
Primary Product of Lipolysis
- Fatty acids
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