Nutrition_CH5_Lipids

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Author:
PicOlio
ID:
124668
Filename:
Nutrition_CH5_Lipids
Updated:
2011-12-20 18:34:01
Tags:
lipids
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Description:
Human Nutrition Ch 5 - Lipids
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  1. Polyunsaturated fats of nutritional interest may have:

    A. one double bond
    B. as many as six double bonds
    C. either two or three double bonds
    D. no more than three double bonds
    B.
    (this multiple choice question has been scrambled)
  2. Carbon-carbon double bonds in the cis form:

    A. extend the fatty acid into a linear shape
    B. are the hallmark of saturated fatty acids
    C. are required to create saturated fatty acids
    D. result in a kinking of the fatty acid into a U-shape
    D.
    (this multiple choice question has been scrambled)
  3. Which fatty acid is considered essential and must be supplied by the diet?

    A. alpha-linolenic acid
    B. gamma-linolenic acid
    C. omega-9 fatty acid
    D. oleic acid
    A.
    (this multiple choice question has been scrambled)
  4. What lipids are a major component of cell and organelle membranes?

    A. phospholipids
    B. triacylglycerols
    C. free fatty acids
    D. ketones
    A.
    (this multiple choice question has been scrambled)
  5. Triacylglycerols with unsaturated fatty acids tend to be _____ at room temperature.

    A. solid fats
    B. non-esterified fats
    C. emulsified
    D. liquid oils
    D.
    (this multiple choice question has been scrambled)
  6. What is the most common lipid characterized by a cyclized internal segment in a 20 carbon chain?

    A. prostaglandins
    B. glycolipids
    C. cholesterol
    D. leukotrenes
    A.
    (this multiple choice question has been scrambled)
  7. Cholesterol serves as a precursor for _____.

    A. phospholipids
    B. prostaglandins
    C. sphingomyelin
    D. estrogens and androgens
    D.
    (this multiple choice question has been scrambled)
  8. Sphingomyelins serve which of the following functions?

    A. constituent of cell and organelle membranes
    B. constituent of myelin sheaths
    C. source of stored energy
    D. precursor for long chain n-3 fatty acids
    B.
    (this multiple choice question has been scrambled)
  9. Pancreatic lipase is characterized by which of the following statements?

    A. It can readily penetrate milk fat globules without bile salt stabilization
    B. It is highly stable in an acid environment
    C. It requires an alkaline environment for optimal activity
    D. It hydrolyzes short-chain fatty acids from the sn-3 position
    C.
    (this multiple choice question has been scrambled)
  10. Undigested lipid delays the rate of emptying of stomach contents, thus:

    A. speeding fat digestion and increasing absorption
    B. enhancing gastric motility
    C. delaying hunger
    D. suppressing GIP and secretin
    C.
    (this multiple choice question has been scrambled)
  11. What is the carrier for long-chain dietary fatty acids in circulation?

    A. cholesterol
    B. albumin
    C. chylomicrons
    D. triacylglycerides
    C.
    (this multiple choice question has been scrambled)
  12. Apolipoproteins function to:

    A. prevent recognition by receptors on cells, thus delaying removal
    B. stimulate enzymatic reactions which regulate the metabolic functions of lipoproteins
    C. destabilize circulating lipoproteins in the blood to promote removal
    D. decrease the density of the lipoprotein
    B.
    (this multiple choice question has been scrambled)
  13. Which of the following lipoproteins are normally present in blood in the greatest quantity during the fasting state?

    A. chylomicrons
    B. VLDL
    C. HDL
    D. LDL
    D.
    (this multiple choice question has been scrambled)
  14. Which of the following lipoproteins is the major carrier of cholesterol away from tissues for excretion by the liver?

    A. VLDL
    B. HDL
    C. LDL
    D. chylomicrons
    B.
    (this multiple choice question has been scrambled)
  15. LDL binds to which of the following cells with high affinity and specificity?

    A. fibroblasts
    B. adipocytes
    C. kidney cells
    D. mutant cells
    A.
    (this multiple choice question has been scrambled)
  16. What enzyme is inhibited by drug therapy to decrease serum cholesterol?

    A. Delta-9 desaturase
    B. Lipoprotein lipase
    C. Cyclo-oxygenase
    D. HMG CoA reductase
    D.
    (this multiple choice question has been scrambled)
  17. Which of the following fatty acids is least likely to promote heart disease?

    A. stearic acid
    B. myristic acid
    C. palmitic acid
    D. eicosapentaenoic acid (EPA)
    D.
    (this multiple choice question has been scrambled)
  18. Trans unsaturated fatty acids elevate serum LDL while decreasing HDL and are therefore likely to:

    A. promote Alzheimer's disease
    B. promote colon cancer
    C. promote heart disease
    D. inhibit colon cancer
    C.
    (this multiple choice question has been scrambled)
  19. Carnitine is the carrier molecule needed for:

    A. removal of acetyl CoA from the mitochondria for fatty acid synthesis
    B. cholesterol synthesis
    C. mitochondrial membrane transport of fatty acids and their CoA derivatives
    D. shuttling NADH into the mitochondria to produce ATP
    C.
    (this multiple choice question has been scrambled)
  20. Beta-oxidation in the mitochondria produces _____.

    A. pyruvate
    B. triglyceride
    C. glycerol
    D. acetyle CoA
    D.
    (this multiple choice question has been scrambled)
  21. Which of the following fatty acids would yield the greatest energy upon complete oxidation?

    A. linoleic acid
    B. alpha-linolenic acid
    C. stearic acid
    D. oleic acid
    C.
    (this multiple choice question has been scrambled)
  22. Cholesterol is produced from:

    A. amino groups
    B. acetyl-CoA
    C. hormones
    D. ketones
    B.
    (this multiple choice question has been scrambled)
  23. The fatty acid synthase system is involved in creating:

    A. palmitate from acetyl CoA
    B. fatty acids from cholesterol
    C. triacyglyceride from glycerol and fatty acids
    D. acetyl CoA from any even-numbered fatty acid
    A.
    (this multiple choice question has been scrambled)
  24. What is the most important unsaturated fatty acid serving as a precursor for eicosanoids that antagonize those made from an omega-6 fatty acid precursor?

    A. oleic acid
    B. linoleic acid
    C. arachidonic acid
    D. eicosapentaenoic acid
    D.
    (this multiple choice question has been scrambled)
  25. Leukotrienes are hormone-like substances made from:

    A. stearic acid
    B. arachidonic acid
    C. myristic acid
    D. palmitic acid
    B.
    (this multiple choice question has been scrambled)
  26. Prostaglandins exhibit a range of physiological actions including:

    A. enhanced fatty acid synthesis
    B. effects on the immune system
    C. effects on visual development
    D. enhanced fatty acid mobilization
    B.
    (this multiple choice question has been scrambled)
  27. Which hormone inhibits hormone-sensitive triacylglycerol lipase found in adipose tissue cells?

    A. insulin
    B. thyroxine
    C. epinephrine
    D. glucagon
    A.
    (this multiple choice question has been scrambled)
  28. What organ provides the major site for lipoprotein formation from endogenously produced lipids?

    A. pancreas
    B. intestine
    C. adipocytes
    D. liver
    D.
    (this multiple choice question has been scrambled)
  29. What is a major risk factor for cardiovascular disease?

    A. high levels of LDL receptors
    B. primarily VLDL and IDL
    C. high levels of circulating LDL
    D. high levels of circulating HDL
    C.
    (this multiple choice question has been scrambled)
  30. The mechanism by which orlistat decreases caloric consumption is by:

    A. inhibiting pancreatic lipase activity
    B. decreasing mRNA for pancreatic lipase
    C. being indigestible by pancreatic lipase
    D. being made from sucrose, thus having only 4 kcal/g
    A.
    (this multiple choice question has been scrambled)

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