20 Questions
Which of the following statements about lipids is NOT true?
Lipids are primarily composed of nitrogen and phosphorus.
Which of the following is NOT a class of lipids?
Amino acid derivatives
Which of the following is a fatty acid derivative?
All of the above
What is the primary function of triacylglycerols (TG) in the body?
Fuel storage and insulation
Which of the following hormones promotes the storage of triacylglycerols?
Insulin
Which of the following is NOT involved in the metabolism of triacylglycerols (TG) in the small intestine?
Amylase
What is the primary function of phospholipids in the body?
Components of membranes and plasma lipoproteins
Which of the following lipids is derived from hydroxy-methyl-glutaric acid (C6 compound)?
Cholesterol
What is the primary function of bile acids and bile salts?
Lipid digestion
Which of the following vitamins is classified as a lipid?
Vitamin D
What is the main role of glycerol derived from the hydrolysis of dietary triacylglycerols in the liver?
Used in the synthesis of triacylglycerols
Which hormones activate the enzyme hormone-sensitive lipase for hydrolysis of adipose tissue triacylglycerols?
Glucagon and adrenaline
Why do red blood cells lack the ability to oxidize fatty acids?
They lack mitochondria
Which vitamin is part of the Coenzyme A complex required for fatty acid activation?
Vitamin B5 (Pantothenic acid)
What inhibits the transportation of activated fatty acids into mitochondria for oxidation?
Malonyl-CoA
What clinical problem is caused by a defect in mitochondrial fatty acid transport system according to the text?
Poor exercise tolerance
What is the main product of beta-oxidation of fatty acids that remains after each cycle?
$Acetyl-CoA$
Where does lipogenesis (synthesis of fatty acids) primarily occur in the cell?
$Cytoplasm$
'Esterification to triacylglycerols for storage in adipose tissue' is the fate of excessive intake of which macronutrients?
Both carbohydrates and protein
How is the enzyme involved in lipogenesis regulated by insulin?
Activated through dephosphorylation
Explore the diverse and hydrophobic nature of lipids, their composition, and roles in the body. Learn about different classes of lipids including fatty acid derivatives, hydroxy-methyl-glutaric acid derivatives, and more.
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