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WorksheetsAtherosclerosis: Pathogenesis, Causes, and Management
Total questions: 63
Worksheet time: 32mins
Which event most directly initiates atherosclerotic plaque development in arterial walls?
Complete occlusion causing distal ischemia
Thrombus organization into fibrous tissue
Calcification of the lipid-rich necrotic core
Endothelial injury to the inner artery lining
During early plaque evolution, macrophages engulf LDL and transform into which cell type?
Smooth muscle cells migrating
Fibroblasts producing scar tissue
Platelets forming white clots
Foam cells within fatty streaks
Which lipid abnormality most strongly promotes atherosclerosis?
Elevated low-density lipoprotein levels
Increased high-density lipoprotein levels
Low total cholesterol concentrations
Reduced triglyceride-rich lipoproteins
Which mechanism best explains hypertension accelerating plaque formation?
Arterial spasm reduces nitric oxide
Salt retention expands plasma volume
Renal hypoperfusion raises renin levels
Mechanical stress damages endothelium
Which stage sequence correctly reflects plaque progression over time?
Fibrous cap to rupture to lipid influx
Calcification to lipid entry to cap
Thrombosis to inflammation to migration
Fatty streak to fibrous cap to calcification
Which patient factor is a nonmodifiable risk for atherosclerosis?
High alcohol intake each weekend
Cigarette smoking over many years
Sedentary behavior with poor diet
Family history of premature disease
Which preventive action most directly targets smoking-related endothelial injury?
Using alcohol to relieve stress
Reducing daily cigarettes by half
Complete cessation of tobacco products
Switching to filtered cigarette brands
Which diagnostic test provides invasive visualization of coronary arterial lumens using contrast dye and X-rays?
Computed tomography angiography
Coronary angiography procedure
Magnetic resonance angiography
Carotid duplex ultrasound
A 58-year-old with diabetes and high LDL begins a statin. What is the primary therapeutic goal of this medication?
Reduce arterial calcification rates
Dissolve existing arterial thrombi
Lower LDL cholesterol concentrations
Raise HDL cholesterol concentrations
Which medication class primarily reduces the risk of thrombus after plaque rupture?
Nitrates for vasodilation
Antihistamines for inflammation
Diuretics such as furosemide
Antiplatelet agents like aspirin
In severe coronary stenosis unresponsive to medication, which procedure restores blood flow by bypassing obstructions?
Coronary artery bypass grafting
Percutaneous balloon angioplasty
Renal artery stent placement
Endarterectomy of carotids
A 66-year-old with long-standing hypertension and smoking develops unstable angina. Which pathologic change most likely precipitated symptoms?
Dilation of the artery with vasodilation
Progressive HDL elevation and clearance
Rupture of a fibrous cap with thrombosis
Regression of inflammation and healing
Which structural feature distinguishes a trans fatty acid from a cis unsaturated fatty acid?
Branched chains around each double bond
Hydrogen atoms on same side of double bond
Presence of multiple hydroxyl functional groups
Hydrogen atoms on opposite sides of double bond
Absence of any carbon–carbon double bonds
Partial hydrogenation of vegetable oils primarily does which of the following?
Breaks triglycerides into glycerol and free cholesterol
Introduces new cis double bonds, increasing fluidity
Removes all double bonds completely, forming polyols
Converts some double bonds to single bonds, creating trans isomers
Oxidizes fatty acids to aldehydes and ketones
Industrial trans fats are most commonly produced by which process?
Esterification of free fatty acids
Partial hydrogenation of vegetable oils
Thermal isomerization of cholesterol
Cold pressing of tropical oils
Complete saponification of triglycerides
Which lipid profile change is most strongly linked to trans fat intake?
Lower LDL with unchanged HDL levels
Lower LDL and higher HDL cholesterol
Higher HDL with unchanged LDL levels
Unchanged LDL and HDL cholesterol
Higher LDL and lower HDL cholesterol
Which statement best describes natural sources of trans fats in the diet?
Small amounts from ruminant meat and dairy
Large amounts from cold-water fish species
Moderate amounts from eggs and legumes
High amounts from olive and avocado oils
Trace amounts from refined table sugars
Which health outcome has the strongest evidence of association with dietary trans fats?
Increased risk of cardiovascular disease
Reduced risk of atherosclerotic plaque
Lower incidence of chronic inflammation
Improved insulin sensitivity in adults
Better endothelial function in arteries
Food labels requiring disclosure of trans fat content primarily aim to achieve what?
Encourage manufacturers to add more preservatives
Eliminate the need for ingredient statements
Help consumers make more informed choices
Replace nutrition facts with front-of-pack logos
Mandate identical serving sizes across products
Which alternative fat avoids trans fats because hydrogenation is brought to completion?
Butter blends enriched with trans isomers
Unrefined seed oils with high linolenic acid
Interestified fats with added cholesterol
Partially hydrogenated oils that are soft
Fully hydrogenated oils that are solid
Which consumer action most directly reduces dietary trans fat intake?
Avoid products listing partially hydrogenated oils
Choose any product labeled low sodium content
Prefer foods fortified with plant sterols only
Select items advertising natural flavorings
Replace all oils with tropical oil blends
Why do trans-configured double bonds lead to different physical properties than cis?
Extra carbons increase mass and enhance fluidity
Bent chains promote weaker packing and lower melting
Straighter chains allow tighter packing and higher melting
Reactive bonds cause rapid oxidative degradation
Polar bonds increase solubility in aqueous media
Which enzyme hydrolyzes cholesterol esters to free cholesterol and fatty acids in the CHOD-PAP method?
Catalase
Peroxidase
Cholesterol oxidase
Cholesterol esterase
In the CHOD-PAP sequence, free cholesterol is oxidized to cholest-4-en-3-one with formation of which byproduct?
Water molecule
Oxygen radical
NADH
Hydrogen peroxide
The peroxidase step forms a colored quinoneimine dye by oxidizing a chromogenic pair commonly composed of which reagents?
Biuret reagent and copper
Coomassie dye and protein
Tetramethylbenzidine and urea
4-aminantipyrine and phenol
At what wavelength is the absorbance of the colored product typically measured in the CHOD-PAP assay?
Around 700 nm
Around 620 nm
Around 500 nm
Around 280 nm
Which statement best describes the relationship between color intensity and cholesterol concentration in this assay?
Color intensity is directly proportional
Color intensity is inversely proportional
Color intensity is constant regardless
Color intensity shows a logarithmic inverse
During the reaction initiation step, the sample is added to reagents containing which set of enzymes and substrates?
Cholesterol esterase, cholesterol oxidase, peroxidase, 4-aminantipyrine, phenol
Lipase, hexokinase, peroxidase, ATP, NADH
Trypsin, urease, catalase, TMB, phenolphthalein
Amylase, LDH, peroxidase, pyruvate, o-dianisidine
What incubation temperature is typically used to allow the CHOD-PAP reactions to proceed?
Approximately 25°C
Approximately 4°C
Approximately 37°C
Approximately 56°C
Which substances are specifically noted as potential interferents at high concentrations in the colorimetric measurement?
Albumin and globulin
Sodium and potassium
Glucose and lactate
Hemoglobin and bilirubin
Which advantage is attributed to the CHOD-PAP method in clinical laboratories?
Lowest cost due to manual mixing
No need for calibration curve
High specificity due to enzymatic reactions
Universal applicability to all analytes
Which sample quality issue may affect results in the CHOD-PAP assay?
Lipemic or hemolyzed specimens
Excess anticoagulant EDTA
Overly alkaline buffers
Deionized water contamination
To determine cholesterol concentration, the measured absorbance is compared against which reference?
A hemoglobin nomogram
A normal patient chart
A standard calibration curve
A reagent blank only
If bilirubin is markedly elevated, what is the most likely analytical effect in the CHOD-PAP assay?
Conversion of dye to a blue chromophore
No impact on quinoneimine dye formation
Activation of cholesterol oxidase activity
Negative interference with color formation
Which component is often labeled 'bad' cholesterol due to its role in atherogenesis?
High-density lipoprotein cholesterol
Low-density lipoprotein cholesterol
Total serum cholesterol
Very low-density lipoprotein cholesterol
Which statement best describes HDL cholesterol?
Transports cholesterol to liver for excretion
Carries cholesterol from liver to tissues
Primarily transports dietary triglycerides
Represents sum of all serum lipids
Which lipid is primarily stored in adipocytes and used for energy?
Triglycerides in fat cells
HDL particles in plasma
LDL particles in plasma
VLDL remnants in serum
Which component is typically estimated as Triglycerides divided by 5 (mg/dL)?
Non-HDL cholesterol
Total cholesterol level
VLDL cholesterol level
HDL cholesterol level
What is the usual fasting duration before a standard lipid panel?
Two to four hours fasting
Fasting not required
Nine to twelve hours fasting
Twenty-four hours fasting
Which total cholesterol value aligns with a typical desirable range?
Between two hundred and two forty mg/dL
Greater than three hundred mg/dL
Less than two hundred mg/dL
Around two hundred fifty mg/dL
Which LDL cholesterol range is considered optimal in adults?
One thirty to one fifty-nine mg/dL
One sixty to one eighty-nine mg/dL
Less than one hundred mg/dL
One hundred to one twenty-nine mg/dL
What HDL threshold is generally protective for women?
Sixty mg/dL or higher
Thirty mg/dL or higher
Forty mg/dL or higher
Fifty mg/dL or higher
Which triglyceride level is typically considered normal?
Greater than four hundred mg/dL
Less than one hundred fifty mg/dL
One fifty to one ninety-nine mg/dL
Two hundred to four hundred mg/dL
Elevated LDL cholesterol most directly increases risk for which outcome?
Chronic obstructive lung disease
Autoimmune thyroiditis development
Atherosclerotic cardiovascular disease
Acute kidney stone formation
A patient’s triglycerides are markedly high and HDL is low. Which interpretation fits best?
Purely elevated HDL syndrome
Atherogenic dyslipidemia pattern
Isolated hyperalphalipoproteinemia
Familial hypo-beta-lipoproteinemia
Which initial management step is recommended for high LDL cholesterol?
Discontinue all physical activity
High-dose corticosteroid therapy
Immediate broad-spectrum antibiotics
Lifestyle changes then consider statins
Which scenario most warrants repeating a lipid panel after lifestyle counseling?
Evaluating bone mineral density
Assessing visual acuity changes
Screening for acute infection
Monitoring response to therapy
A patient presents with LDL 170 mg/dL, HDL 35 mg/dL, TG 240 mg/dL. Which is the most appropriate combined risk interpretation?
Isolated HDL elevation only
Low cardiovascular risk profile
Normal triglyceride pattern
High atherosclerotic risk profile
Which mechanism most directly leads to hepatic steatosis in fatty liver disease?
Increased albumin synthesis by hepatocytes
Enhanced bile acid secretion into the intestine
Excess ketone body excretion by the kidneys
Imbalance between fat delivery and export capacity
Insulin resistance promotes fatty liver primarily by causing which change in adipose tissue?
Enhanced leptin sensitivity reducing appetite
Decreased adipogenesis storing fewer triglycerides
Increased lipolysis releasing free fatty acids
Suppressed chylomicron production in enterocytes
Which factor best distinguishes NAFLD from AFLD?
Rate of progression to end-stage liver disease
Degree of central adiposity and waist circumference
Presence or absence of significant alcohol intake
Magnitude of ALT elevation over normal ranges
NASH is best described as which condition?
Inflammatory form of NAFLD causing hepatocellular injury
Early asymptomatic stage of alcoholic fatty liver
Pure triglyceride accumulation without inflammation
Fibrosis-free steatosis that never progresses
Which pattern of liver enzymes most often suggests fatty liver disease?
Extremely high ALT and AST exceeding tenfold
Normal ALT and AST with high bilirubin only
Markedly low ALT with normal AST levels
Mildly elevated ALT and AST in blood tests
What does FibroScan measure in the evaluation of liver disease?
Liver stiffness to assess fibrosis severity
Hepatic fat fraction to quantify steatosis
Bile duct caliber to detect obstruction
Portal venous flow to gauge hypertension
Which imaging test is most commonly used first to detect liver fat accumulation?
MRI because of best tissue specificity
Ultrasound due to accessibility and safety
CT scan because of highest sensitivity
PET scan for metabolic activity mapping
Which risk factor most strongly increases the likelihood of NAFLD?
Obesity with associated insulin resistance
Chronic viral hepatitis coinfection
High-protein ketogenic dietary patterns
Gallstone disease causing biliary pain
Which medication class is used to address dyslipidemia in fatty liver management?
Loop diuretics to excrete sodium
Proton pump inhibitors for reflux
Beta-blockers to reduce heart rate
Statins to lower atherogenic lipids
Which statement about alcohol and fatty liver is most accurate?
Complete abstinence is essential for AFLD patients
Moderate drinking improves insulin sensitivity
Alcohol has no effect on hepatic fat handling
Short-term abstinence reverses cirrhosis rapidly
Which combination best represents components of metabolic syndrome linked to NAFLD risk?
Hypothyroidism, bradycardia, low triglycerides
Leukocytosis, fever, elevated lactate levels
Anemia, hyponatremia, low blood pressure
Hypertension, hyperglycemia, abnormal cholesterol
Which precaution directly targets progression from steatosis to NASH?
Intermittent alcohol binges to relieve stress
Avoidance of vegetables to reduce fiber intake
High-fructose diet to elevate glycogen stores
Regular aerobic exercise to improve insulin sensitivity
Which diagnostic procedure is definitive for grading inflammation and fibrosis in fatty liver disease?
Liver biopsy with microscopic assessment
Nonfasting lipid profile measurement
Serum ALT to AST ratio calculation
Hepatic ultrasound brightness score
In a patient with severe obesity and refractory NAFLD, which advanced intervention may be considered?
Long-term steroids to reduce inflammation
Plasmapheresis to clear inflammatory mediators
Bariatric surgery for sustained weight loss
Chelation therapy to remove heavy metals
Which pathophysiologic sequence best explains fat accumulation and injury in steatosis?
Autoantibody formation, complement activation
Reduced bile salts, cholestasis, pigment deposition
Hepatic copper overload, mitochondrial toxicity
Increased FFA influx, oxidative stress, inflammation
