1Lipids are substances that are insoluble in water and can be extracted from cells only by
organic solvents
2The most abundant type of lipids included in the group that also contains steroids and terpenes
fats
3General term for lipids that are synthesized from isoprene units
terpenes
4Carboxylic esters derived from glycerol that are also known as glycerides
fats
5Class of natural or synthetic organic compounds characterized by a molecular structure of 17-carbon atoms arranged in four rings
steroids
6Percentage of fat found in food comprised by triglycerides
98%
7Components that make up a triglyceride
fatty acid and glycerol
8Long carbon chains joined by single (saturated) or double bonds (unsaturated) and a terminal carboxyl group
fatty acids
9Composition of the remaining 2% of fat in food
cholesterol, phospholipids, diglycerides, fat-soluble vitamins, steroids, and terpenes
10In cholesterol, what ring does the double bond located?
Where does the 1st double bond located
Where does double bond located for methyl groups?
Ring B
5th carbon
c10 and c13
11this is the most insoluble compounds and also called neutral fats
TAGs
12Describe all the characteristics of Major Alipoproteins based on their location and functions:
A1
A2
A4
B48
Check on the notes
13Major lipoprotein locations for Apolipoprotein C1
Chylomicrons, VLDL
14Primary function of Apolipoprotein C1
Activates LCAT
15Major lipoprotein locations for Apolipoprotein C2
Chylomicrons, VLDL
16Primary function of Apolipoprotein C2
Activates LPL
17Major lipoprotein locations for Apolipoprotein C3
Chylomicrons, VLDL, HDL
18Primary function of Apolipoprotein C3
Regulates clearance of TAG-rich lipoprotein remnants
19Major lipoprotein locations for Apo D (Apo A-III), also called thin line apoprotein
HDL
20Primary function of Apo D (Apo A-III)
Activates LCAT
21Major lipoprotein locations for Apolipoprotein E
VLDL, CM, HDL
22Primary function of Apolipoprotein E
Recognition factor that targets CM and VLDL remnants to hepatic receptors
23Common remnants of TAG-rich lipoproteins
IDL and beta-VLDL
24Apolipoprotein associated with LDL
Apo B-100
25Apolipoprotein associated with VLDL
B-100
26Classification of fatty acids containing 4-6 carbon atoms
Short chained fatty acids
27Classification of fatty acids containing 8-12 carbon atoms
Medium chained fatty acids
28Classification of fatty acids containing more than 12 carbon atoms
Long chained fatty acids
29Terminology for fatty acids with no C=C bonds
Saturated fatty acids
30Terminology for fatty acids containing one C=C bond
Monounsaturated fatty acids
31Terminology for fatty acids containing more than one C=C bond
Polyunsaturated fatty acids (PUFA)
32Lipoprotein with the highest protein content
HDL
33Lipoprotein with the highest cholesterol content
LDL
34Lipoprotein with the highest TAG content
Chylomicrons
35Lipoprotein with the highest phospholipid content
HDL
36Identify the newly secreted HDL that is more active in removing cholesterol from cells
Discoid
37Identify the HDL formed when discoid HDL acquires cholesterol from cells and transforms into a spherical shape
Spherical
38List of minor lipoproteins based on the provided selection
Lp(a) and IDL
39Characteristic of Lp(a) related to heart health
atherogenic
40Reference substance that Lp(a) is structurally similar to
plasminogen-like
41Major lipoproteins listed in the handwritten notes
HDL, LDL, VLDL, CM
42Method for one-step cholesterol determination using colorimetry
Pearson, Stern and Mac Gavack
43Method for two-step cholesterol determination involving color and extraction
Bloor’s
44Method for three-step cholesterol determination involving color, extraction, and saponification
Abell-Kendall
45Method for four-step cholesterol determination involving color, extraction, saponification, and precipitation
Schoenheimer Sperry, Parekh and Jung
46Condition characterized by an increase in Fe^{3+} (Ferric) and iron storage markers
Hemochromatosis
47Monosaccharides are the basic building blocks for this macronutrient group
Carbs
48Amino acids are the building blocks of this nutrient class
Proteins
49Basic structural components that make up Lipids
fatty acids
50Five-carbon units that serve as the building blocks for Terpenes
isoprene units
51Specific chemical bond that links fatty acids to a glycerol backbone
Ester bond
52Clinical term for fats, such as saturated fats, that promote the formation of arterial plaques
atherogenic
53Examples of healthy unsaturated fats including MUFA and PUFA
Monounsaturated and Polyunsaturated fatty acids
54Common source of beneficial Omega-3 fatty acids mentioned in the notes
mackerel or tuna belly
55Chemical process used to convert liquid oils into solid trans fats
hydrogenation
56Ranking of lipoproteins from highest to lowest protein content
HDL > LDL > VLDL > CM
57Ranking of lipoproteins from highest to lowest cholesterol content
LDL > VLDL > HDL > CM
58Ranking of lipoproteins from highest to lowest TAG (Triglyceride) content
CM > VLDL > LDL > HDL
59Ranking of lipoproteins from highest to lowest phospholipid content
HDL > LDL > VLDL > CM
60Lipoprotein that is the least dense and creates a creamy top layer in plasma
Chylomicrons (CM)
61Appearance of plasma when VLDL levels are significantly elevated
turbid (milky/cloudy)
62Appearance of plasma when only LDL levels are elevated
clear
63Shape and status of Nascent HDL newly released from the liver
discoid / flat shape
64Status and shape of HDL after it acquires cholesterol from cells
Spherical / mature form
65Direction of the Reverse Cholesterol Pathway
Peripheral cholesterol to Liver
66Direction of the Forward Cholesterol Pathway mediated by LDL and VLDL
Liver to Peripheral tissues
67List the quantitative values for Positive Risk Factors (+RF) for HDL, LDL, and TAG
HDL < 40 mg/dL; LDL > 160 mg/dL; TAG > 150 mg/dL
68Specific HDL level considered to be cardioprotective
HDL > 60 mg/dL
69Conversion factor used to change TAG from mg/dL to mmol/L
\times 0.0113
70Divisor used for TAG in the DeLong formula for calculating LDL
6.5
71Divisor used for TAG in the Friedewald formula for calculating LDL in mg/dL
5
72Color produced by the Liebermann-Burchard chemical method for cholesterol
green
73Color produced by the Salkowski chemical method for cholesterol
red
74Steps involved in the Abell-Kendall 3-step reference method
Color, Extraction and Saponification
75Names associated with the 4-step reference method for cholesterol
Schoenheimer-Sperry, Parekh, and Jung
76Identify the clinical condition that becomes significantly more likely when an individual presents with positive (+) lipid risk factors.
cardiac arrest
77Specify the threshold concentration value for HDL cholesterol that constitutes a positive risk factor for cardiac disease.
< 40 mg/dL
78Specify the threshold concentration value for LDL cholesterol that constitutes a positive risk factor for cardiac disease.
> 100 mg/dL
79Specify the first threshold concentration value for triglycerides (TAG) that acts as a positive risk factor for cardiac disease.
> 130 mg/dL
80Identify the clinical heart condition that an individual is considered protected or free from when they possess negative (-) risk factors.
Myocardial Infarction
81Specify the target concentration value for HDL cholesterol required to achieve a negative risk factor status.
>= 60 mg/dL
82Specify the target concentration value for LDL cholesterol required to achieve a negative risk factor status.
< 100 mg/dL
83Specify the threshold concentration value for total cholesterol that acts as a positive risk factor.
> 200 mg/dL
84Specify the second threshold concentration value for triglycerides (TAG) that acts as a positive risk factor.
> 150 mg/dL
85Identify the specific lipid parameter and its value that is explicitly designated as cardioprotective.
HDL >= 60 mg/dL
86Identify the traditional cholesterol colorimetric chemical reaction that yields a characteristic green color.
Liebermann-Burchard
87Identify the traditional cholesterol colorimetric chemical reaction that yields a characteristic red color.
Salkowski
88List the three specific analytical procedures that comprise the 3 step method for lipid determination.
color + extract + saponification
89Name the specific 3 step reference method used for cholesterol extraction and lipid determination.
Abell-Kendall
90List the four designated multi-step methods or investigators associated with the 4 step method for lipid determination.
Schoenheimer, Sperry, Parekh, Jung
91CH3-CH2-... + H2 (saturated)
Hydrogenation
92CH3-CH2-... (unsaturated) -> Hydrogenation ->
CH3-CH2-... (saturated)
93The process that converts unsaturated fatty acids into saturated fatty acids by adding hydrogen atoms is called
Hydrogenation
94Identify the missing compound in the reaction pathway: Safflower + 2H -> Stearic Acid -> Stearic Acid ->
Oleic Acid
95Name the type of isomerism formed during the partial hydrogenation of unsaturated fatty acids
Trans fatty acids
96Identify the main enzyme path involved in reverse cholesterol pathway
LPL, LCAT, and HL
97State the function of LPL and HL in the reverse cholesterol pathway
it is used to clear lipid and undergo LCAT-HDL-cholesterol ester, LDL, and VLDL are products of VLDL lipolysis
98Identify the protein that helps in the clearance of lipids in the reverse cholesterol pathway
Apo A-I on HDL surface
99State the clinical condition that occurs when there is a defect in the reverse cholesterol pathway
Atherosclerosis
100Identify the main enzyme involved in the forward cholesterol pathway
LCAT (lecithin-cholesterol acyltransferase)
101Specify the lipid that is increased in the forward lipid defects
IDL
102Identify the condition caused by an increased amount of IDL in forward lipid defects
heart disease risk factor
103Name the lipid transport particle cleared by LDL filters or liver in forward lipid defects
IDL
104Identify the receptor type that is defective in familial hypercholesterolemia
LDL Receptor
105Identify the molecule that is unable to bind to its receptor due to LDL receptor defects
ApoB-100
106State the hereditary condition characterized by LDL receptor defects and high ApoB-100 accumulation in the blood
Familial Hypercholesterolemia
107State the common clinical sign or deposition of cholesterol seen in the family of patients with LDL receptor defects
xanthomas
108Identify the organ where ApoB-100 defects significantly impair the clearance of LDL
liver
109Explain how defective ApoB-100 affects internal lipid levels in the body
it fails to lock onto liver receptors, which leads to high cholesterol levels because LDL cannot enter cells, so LDL and VLDL increase
110Identify the specific lipid transport protein that is absent in abetalipoproteinemia
MTP (Microsomal Triglyceride Transfer Protein)
111Identify the two main lipoproteins that are absent or low in abetalipoproteinemia due to MTP defects
Chylomicrons and VLDL
112State the clinical presentation of abetalipoproteinemia related to fat absorption
steatorrhea
113Identify the primary lipoprotein that is low in Tangier's disease
HDL
114State the physical manifestation or symptom seen in the tonsils of patients with Tangier's disease
orange tonsils
115Identify the specific cell type where cholesterol accumulates in Tangier's disease
macrophages
116Name the condition characterized by low HDL, orange tonsils, and cholesterol accumulation in macrophages
Tangier's disease
117Identify the specific apolipoprotein that is missing in Apo A-I deficiency
Apo A-I
118Explain the effect of Apo A-I deficiency on HDL levels
critically reduces the level of HDL
119Name the condition characterized by severe reduction in HDL due to the absence of its primary structural protein
Apo A-I deficiency
120State the classification of a risk factor if the cholesterol level is high, LDL is low, and HDL is low
High Risk Factor
121State the classification of a risk factor if the cholesterol level is high, LDL is high, and HDL is low
Very High Risk Factor
122Enumerate the specific lipid profile criteria required to be classified under a High Risk Factor
high cholesterol, low LDL, and low HDL
123Enumerate the specific lipid profile criteria required to be classified under a Very High Risk Factor
high cholesterol, high LDL, and low HDL
124State the numerical range for low HDL that contributes to high risk classification
HDL <40 mg/dL
125State the numerical range for high LDL that contributes to high risk classification
LDL >100, >130, or >160 mg/dL
126State the numerical range for high cholesterol that contributes to high risk classification
cholesterol >200 mg/dL
127State the numerical range for high triglycerides that contributes to high risk classification
triglycerides >150 mg/dL
128Identify the specific lifestyle modification program recommended for patients categorized under lipid risk factors
therapeutic lifestyle intervention reduction program
129Enumerate the lipid criteria for a patient categorized under "Negative RF"
HDL > 60 mg/dL and LDL <100 mg/dL, <130 mg/dL, or <160 mg/dL
130Identify the specific lipid value that acts as a cardioprotective factor when it is greater than 60 mg/dL
HDL > 60 mg/dL
131Identify the specific lipid value that acts as a cardioprotective factor when it is less than 100 mg/dL
LDL < 100 mg/dL
132State the clinical implication of having an HDL level greater than 60 mg/dL and LDL less than 100 mg/dL
Cardioprotective (risk of hypercholesterolemia low)
133Identify the condition characterized by an independent risk factor for arterial diseases involving plasminogen-like activity
Lp(a)
134State the structural characteristics or functional similarity of Lp(a)
independent risk factor for arterial cell, PLASMINOGEN-LIKE ACTIVITY
135Identify the specific lipid parameter characterized by a light density lipoprotein and a sticky nature
Lp(a)
136State the clinical risk or consequence associated with elevated Lp(a) levels
CLOT REFUSES TO DISSOLVE, vascular blockages
137Identify the primary reason why clots refuse to dissolve in the presence of high Lp(a)
due to its plasminogen-like activity that inhibits normal clot breakdown
138State the normal reference value for total cholesterol
<200 mg/dL
139State the reference range for borderline total cholesterol
200-239 mg/dL
140State the reference range for high total cholesterol
Greater than or equal to 240 mg/dL
141Enumerate the three classification categories for total cholesterol levels
Normal, Borderline, and High
142Identify the chemical method used in the isolation and separation step of HDL measurement
precipitation
143Enumerate the two main steps involved in the chemical method for HDL measurement
Step 1: Isolation/Separation and Step 2: Quantification
144State the specific chemical reaction utilized in the quantification step of HDL measurement
Lieberman-Burchard reaction or Abell-Kendall
145Enumerate the two reagents commonly used in the isolation step of HDL to precipitate non-HDL lipoproteins
Heptane + Sulfuric Acid or Phosphotungstate
146Identify the reagent used in the three-step method for HDL isolation that involves heavy metal precipitation
Abell-Kendall method (using polyanions like phosphotungstate)
147State the function of the polyanions and divalent cations in HDL isolation
VLDL, Chylomicrons, and LDL are precipitated out, leaving HDL in the supernatant
148Identify the component found in the supernatant after the precipitation step in HDL isolation
HDL
149Identify the current reference method used for the quantification of cholesterol as established by CDC
CDC Reference Method (Abell, Levy, and Brodie method)
150State the original reference method that the current CDC method for cholesterol quantification was modified from
Abell-Kendall method
151Identify the three main types of methods used for LDL measurement in the laboratory
Measured, Calculated, and Preferable Method
152Identify the specific laboratory method used for direct measurement of LDL
Homogeneous Method
153Enumerate the two traditional mathematical equations used for calculated LDL
Friedewald Method and De Long Method
154State the mathematical formula for the Friedewald method used to calculate LDL cholesterol in mg/dL
LDL = TC - HDL - (TG / 5)
155State the mathematical formula for the De Long method used to calculate LDL cholesterol in mg/dL
LDL = TC - HDL - (TG / 6.6)
156Identify the specific lipid parameter that must be less than 400 mg/dL for the Friedewald equation to remain valid
Triglycerides (TG)
157State the main limitation or restriction of using the Friedewald equation for calculating LDL
cannot be used if Triglycerides (TG) are >400 mg/dL
158Identify the preferable method used for measuring LDL when triglyceride levels are extremely high or in non-fasting samples
Homogeneous Method
159Identify the specific metabolic disease characterized by deficient or absent ABCA1 transporter activity
Tangier's disease (ABCA1 deficiency)
160State the genetic transmission pattern or inheritance of Tangier's disease
Autosomal Recessive
161Identify the primary lipoprotein that is severely decreased or absent in Tangier's disease due to ABCA1 mutation
HDL (Alpha-lipoprotein)
162Identify the specific organ or tissue where cholesterol esters accumulate dramatically in Tangier's disease, changing its color
tonsils (orange tonsils)
163Identify the specific condition characterized by a mutation in the LCAT gene leading to fish-eye disease
LCAT deficiency
164State the clinical manifestation in the eyes of a patient with LCAT deficiency
Fish-eye disease (corneal opacities)
165Identify the specific lipoprotein that is markedly decreased in LCAT deficiency
HDL
166State the date written on the slide discussing LCAT deficiency and fish-eye disease
May 20, 2026
167Identify the clinical significance or effect of having a low HDL level (<40 mg/dL)
Low HDL (HDL <40) is an alpha-lipoproteinemia
168Identify the genetic cause behind familial hypercholesterolemia involving the ApoB gene
ApoB gene mutation
169Identify the primary lipoprotein that accumulates to very high levels due to an ApoB gene mutation
LDL