Heart Health: Beyond Cholesterol

• A. Physical inactivity
• B. Age ✓
• C. High blood pressure
• D. Smoking

Why: Age is a non-modifiable risk factor because it cannot be changed. Risk of heart disease generally increases as people get older. Physical inactivity, high blood pressure, and smoking are modifiable risk factors that can be improved through lifestyle or medical management.

• A. Family history of heart disease
• B. Biological sex
• C. Cigarette smoking ✓
• D. Ethnicity

Why: Cigarette smoking is a major modifiable risk factor because quitting can substantially reduce cardiovascular risk. Family history, biological sex, and ethnicity are non-modifiable factors that a person cannot change.

• A. Normal blood pressure
• B. Low blood pressure
• C. Elevated or stage 1 hypertension range ✓
• D. Severe hypertension requiring emergency care

Why: Under current American Heart Association guidelines, a reading of 130-139 systolic or 80-89 diastolic falls in the stage 1 hypertension range. Normal is below 120/80, and severe hypertension typically begins at readings of 180/120 or higher.

• A. Eating a diet high in processed sodium
• B. Regular aerobic physical activity ✓
• C. Reducing sleep to under five hours
• D. Increasing alcohol intake

Why: Regular aerobic exercise helps strengthen the heart and improve blood vessel function, which lowers blood pressure. High sodium intake and increased alcohol raise blood pressure, and chronic short sleep is linked to higher cardiovascular risk.

• A. Diabetes directly lowers heart rate permanently
• B. High blood sugar damages blood vessels and accelerates atherosclerosis ✓
• C. Diabetes prevents the body from producing any blood cells
• D. Diabetes only affects the lungs and not the circulatory system

Why: Chronically high blood glucose damages the inner lining of blood vessels and promotes atherosclerosis, the buildup of plaque in arteries. This is why diabetes is recognized as a major independent risk factor for heart disease and stroke.

• A. Hypotension
• B. Hypertension ✓
• C. Tachycardia
• D. Bradycardia

Why: Hypertension is the medical term for persistently elevated blood pressure. Hypotension refers to abnormally low blood pressure, while tachycardia and bradycardia describe fast and slow heart rates, respectively.

• A. Heart rate and breathing rate
• B. Systolic and diastolic pressure ✓
• C. Cholesterol and triglycerides
• D. Oxygen level and pulse

Why: Blood pressure is recorded as systolic pressure (the pressure when the heart beats and pushes blood out) over diastolic pressure (the pressure when the heart rests between beats). For example, 120/80 mmHg.

• A. 160/100 mmHg
• B. 140/90 mmHg
• C. 120/80 mmHg ✓
• D. 90/60 mmHg

Why: A reading below 120/80 mmHg is generally considered normal for adults. Readings of 160/100 and 140/90 fall into hypertension ranges, while 90/60 may indicate low blood pressure.

• A. Eating more sodium-rich foods
• B. Reducing sodium intake and increasing physical activity ✓
• C. Drinking more caffeinated beverages
• D. Avoiding all forms of exercise

Why: Reducing salt (sodium) intake and getting regular physical activity both help lower blood pressure. Excess sodium causes the body to retain fluid, raising pressure, while exercise strengthens the heart and improves blood vessel function.

• A. It causes loud symptoms that are easy to ignore
• B. It often has no noticeable symptoms while damaging the heart and blood vessels ✓
• C. It only affects people over the age of 80
• D. It disappears on its own without treatment

Why: Hypertension frequently produces no obvious symptoms, yet over time it damages arteries, the heart, kidneys, and brain. This is why regular blood pressure screening is important even when you feel well.

• A. A sudden drop in blood pressure caused by narrowed arteries
• B. The immune system's response to injury or irritation within the blood vessel walls ✓
• C. An abnormal rhythm of the heart caused by electrical signal problems
• D. The buildup of calcium in the heart muscle after a heart attack

Why: Inflammation is the body's immune response to injury or irritation. In heart disease, chronic low-grade inflammation within the artery walls contributes to plaque formation and instability, making it a key factor beyond cholesterol levels alone.

• A. A cholesterol-carrying protein that clogs arteries
• B. A liver-produced marker that rises when there is systemic inflammation, helping estimate cardiovascular risk ✓
• C. A hormone that regulates heart rate during exercise
• D. A clotting factor that prevents excessive bleeding

Why: CRP is a protein made by the liver that increases in response to inflammation. A high-sensitivity CRP blood test is used to estimate cardiovascular risk, especially in people whose cholesterol levels alone do not fully explain their risk.

• A. Eating a diet rich in fruits, vegetables, and whole grains ✓
• B. Consuming large amounts of refined sugar and processed foods
• C. Getting little or no physical activity
• D. Smoking to reduce stress levels

Why: Diets rich in fruits, vegetables, whole grains, and healthy fats contain antioxidants and fiber that help lower inflammatory markers. Refined sugars and processed foods tend to increase inflammation, while smoking and inactivity both promote it.

• A. Stable, hard, and fully calcified
• B. Thin-capped and inflamed, with a large lipid core ✓
• C. Small and located in a vein rather than an artery
• D. Completely cleared by the immune system

Why: Inflamed plaques with thin fibrous caps and large lipid cores are considered vulnerable. They are more prone to rupture, which can trigger a blood clot that blocks blood flow and causes a heart attack. Inflammation weakens the cap, making rupture more likely.

• A. Because cholesterol has no connection to heart health at all
• B. Because chronic inflammation can damage artery walls and promote plaque instability even when cholesterol is normal ✓
• C. Because normal cholesterol always means the heart is already damaged
• D. Because inflammation only affects people who have high cholesterol

Why: Cholesterol is only one part of the picture. Chronic inflammation can damage the endothelium (the inner lining of arteries), encourage plaque buildup, and make plaques unstable, so some people with normal cholesterol still develop heart disease.

• A. Glucagon
• B. Insulin ✓
• C. Cortisol
• D. Adrenaline

Why: Insulin is released by the pancreas after eating and signals cells, such as muscle and fat cells, to absorb glucose from the bloodstream for energy or storage. Glucagon does the opposite by raising blood sugar, while cortisol and adrenaline are stress hormones.

• A. Insulin resistance ✓
• B. Hyperthyroidism
• C. Anemia
• D. Hypoglycemia

Why: Insulin resistance means the body's cells do not respond well to insulin's signal. The pancreas compensates by producing more insulin, and over time this can lead to high blood sugar and raise the risk of heart disease.

• A. It strengthens the walls of arteries
• B. It has no effect on blood vessels
• C. It can damage blood vessel walls and promote plaque buildup ✓
• D. It only affects the kidneys, not the heart

Why: Persistently high blood sugar can damage the inner lining of blood vessels and contribute to inflammation and atherosclerosis, the buildup of plaque in arteries. This increases the risk of heart attack and stroke.

• A. Low waist circumference
• B. High blood pressure
• C. Very low triglycerides
• D. Elevated fasting blood sugar ✓

Why: Metabolic syndrome is a cluster of conditions that includes elevated fasting blood sugar, high blood pressure, large waist circumference, high triglycerides, and low HDL cholesterol. Having several of these together substantially raises heart disease risk.

• A. Eating large meals less often while avoiding all physical activity
• B. Regular physical activity combined with a balanced diet rich in fiber ✓
• C. Eliminating all carbohydrates permanently
• D. Taking high-dose sugar supplements

Why: Regular exercise helps muscles take up glucose independently of insulin, and a diet rich in fiber, vegetables, and whole grains slows sugar absorption. Together these improve insulin sensitivity and reduce cardiovascular risk.

• A. A very low-fat diet with high refined carbohydrate intake
• B. A Mediterranean-style diet rich in vegetables, fruits, whole grains, legumes, nuts, olive oil, and fish ✓
• C. A high-protein diet based primarily on red and processed meats
• D. A diet high in sugary beverages and fried foods with minimal vegetables

Why: The Mediterranean dietary pattern has the strongest body of evidence for heart protection, including large randomized trials such as PREDIMED. Its emphasis on plant foods, healthy fats like olive oil, and fish supports healthy blood pressure, lipids, and inflammation levels.

• A. Whole grains contain no carbohydrates, so they do not affect blood sugar
• B. Whole grains retain fiber and nutrients that help lower LDL cholesterol and improve blood sugar control ✓
• C. Refined grains contain more sodium than whole grains
• D. Whole grains are rich in saturated fat, which helps raise HDL cholesterol

Why: Refining removes the bran and germ, stripping fiber, vitamins, and minerals. The soluble fiber in whole grains such as oats and barley helps reduce LDL cholesterol, and the overall package improves blood sugar stability, both of which benefit the heart.

• A. Saturated fats from butter and full-fat dairy
• B. Trans fats from partially hydrogenated oils
• C. Unsaturated fats from sources like olive oil, avocados, nuts, and fatty fish ✓
• D. Any fat, as long as total calories are kept low

Why: Unsaturated fats, especially monounsaturated and polyunsaturated types, can help lower LDL cholesterol when they replace saturated fats. Trans fats raise LDL and lower HDL and should be avoided, while the quality of fat matters as much as the quantity.

• A. To promote rapid weight loss through very low calorie intake
• B. To lower blood pressure, with an emphasis on fruits, vegetables, low-fat dairy, and reduced sodium ✓
• C. To increase muscle mass through high protein consumption
• D. To eliminate all carbohydrates from the diet

Why: DASH stands for Dietary Approaches to Stop Hypertension. It was developed to lower blood pressure and emphasizes fruits, vegetables, whole grains, low-fat dairy, and limits on sodium, saturated fat, and sugar.

• A. Replacing a serving of sugary soda with water or unsweetened tea ✓
• B. Adding a daily serving of processed deli meat to lunch
• C. Switching from vegetables to fried potato snacks
• D. Increasing portions of fast food because it is convenient

Why: Sugary drinks contribute added sugar linked to weight gain, higher triglycerides, and insulin resistance. Replacing them with water or unsweetened beverages is a simple, high-impact change, while the other options increase sodium, processed meat, or unhealthy fats.

• A. Heavy weightlifting with long rest periods
• B. Sustained aerobic activity such as brisk walking, swimming, or cycling ✓
• C. Brief maximal sprints followed by full recovery
• D. Static stretching held for several minutes

Why: Sustained aerobic activity raises heart rate for extended periods, strengthening the heart muscle and improving the efficiency of oxygen delivery to the body.

• A. 30 minutes total per week
• B. 60 minutes total per week
• C. 150 minutes total per week ✓
• D. 300 minutes total per week

Why: Major health organizations recommend at least 150 minutes of moderate-intensity aerobic activity per week, which can be spread across several days.

• A. You can speak in full sentences but cannot sing ✓
• B. You can easily hold a conversation without any breathlessness
• C. You cannot speak at all without stopping
• D. You feel no change in your breathing

Why: The 'talk test' is a practical measure: during moderate activity you can talk but not sing, while vigorous activity makes talking difficult.

• A. It guarantees faster weight loss
• B. It allows the heart, blood vessels, and muscles to adapt safely and reduces injury risk ✓
• C. It eliminates the need for rest days
• D. It prevents the heart from beating faster during activity

Why: Gradual progression lets the cardiovascular system and musculoskeletal system adapt over time, lowering the risk of strain, injury, and overexertion.

• A. Mild muscle soreness the day after a workout
• B. Slightly elevated breathing during a hill climb
• C. Chest pain, pressure, or unusual shortness of breath ✓
• D. Feeling warm and sweaty during activity

Why: Chest pain, pressure, or disproportionate shortness of breath can signal a serious cardiac problem and requires stopping activity and seeking prompt medical evaluation.

• A. Insulin
• B. Cortisol ✓
• C. Melatonin
• D. Thyroxine

Why: Cortisol, released by the adrenal glands during stress, can temporarily increase heart rate and blood pressure. Insulin regulates blood sugar, melatonin regulates sleep cycles, and thyroxine regulates metabolism.

• A. 3 to 4 hours
• B. 5 to 6 hours
• C. 7 to 9 hours ✓
• D. 10 to 12 hours

Why: Most adults need 7 to 9 hours of sleep per night. Chronically sleeping less than 7 hours is linked to higher blood pressure, obesity, and cardiovascular disease risk.

• A. A condition where you wake up too early, which has no effect on the heart
• B. A condition where breathing repeatedly stops or becomes shallow during sleep, which can raise blood pressure and strain the heart ✓
• C. A condition where you sleep too deeply, which lowers heart rate permanently
• D. A condition caused by drinking coffee late in the day

Why: Obstructive sleep apnea involves repeated pauses in breathing during sleep, causing oxygen drops and surges in stress hormones. This can raise blood pressure and increase the risk of heart disease and irregular heart rhythms.

• A. Smoking to relax
• B. Eating large meals late at night
• C. Regular physical activity and mindfulness or breathing exercises ✓
• D. Avoiding all social contact

Why: Regular physical activity and mindfulness or breathing practices help lower stress hormone levels and blood pressure. Smoking, late heavy meals, and social isolation all harm heart health.

• A. It has no connection to stress hormones
• B. It lowers cortisol to zero, eliminating stress entirely
• C. It can keep stress hormones elevated and make the body less able to recover from daily stress ✓
• D. It only affects mood, not the cardiovascular system

Why: Insufficient or disrupted sleep can keep cortisol and sympathetic nervous system activity elevated, reducing the body's ability to recover. Over time this contributes to higher blood pressure and inflammation.