#1
Which of the following is a major risk factor for cardiovascular disease?
Smoking
ExplanationSmoking is a major risk factor due to its detrimental effects on the cardiovascular system, including damage to blood vessels and increased risk of atherosclerosis.
#2
Which of the following is a symptom of angina?
Chest pain or discomfort
ExplanationAngina is characterized by chest pain or discomfort caused by reduced blood flow to the heart muscles, often due to coronary artery disease.
#3
Which type of cholesterol is commonly referred to as 'good' cholesterol?
HDL cholesterol
ExplanationHDL cholesterol is known as 'good' cholesterol because it helps remove excess cholesterol from the bloodstream, reducing the risk of plaque buildup in arteries.
#4
What is the term for the condition where the blood supply to the heart muscle is reduced, often causing chest pain or discomfort?
Angina
ExplanationAngina is a condition characterized by reduced blood flow to the heart muscle, often causing chest pain or discomfort due to inadequate oxygen supply.
#5
What is the term for the condition characterized by an irregular heart rhythm?
Arrhythmia
ExplanationArrhythmia refers to an irregular heart rhythm, which can manifest as tachycardia (fast heartbeat), bradycardia (slow heartbeat), or irregular heartbeats.
#6
What is the recommended duration of moderate-intensity aerobic exercise per week for cardiovascular health?
60 minutes
ExplanationThe recommended duration of 60 minutes of moderate-intensity aerobic exercise per week helps improve cardiovascular health by strengthening the heart and improving circulation.
#7
Which of the following is a measure of cardiovascular fitness?
VO2 max
ExplanationVO2 max is a measure of cardiovascular fitness representing the maximum amount of oxygen that the body can utilize during intense exercise.
#8
What is the term for the maximum amount of oxygen that an individual can utilize during intense exercise?
Aerobic capacity
ExplanationAerobic capacity refers to the maximum amount of oxygen that an individual's body can use during intense exercise, often indicating cardiovascular fitness level.
#9
Which type of exercise is most effective for improving cardiovascular endurance?
High-intensity interval training (HIIT)
ExplanationHIIT is particularly effective for improving cardiovascular endurance as it alternates between short bursts of intense activity and rest, challenging the heart and improving its efficiency.
#10
What is the target heart rate zone for aerobic exercise, often recommended for cardiovascular benefits?
70-80% of maximum heart rate
ExplanationExercising within the 70-80% of maximum heart rate zone ensures optimal cardiovascular benefits, as it challenges the heart without overexertion.
#11
What is the primary function of LDL cholesterol in the body?
Transport cholesterol to cells
ExplanationLDL cholesterol primarily transports cholesterol to cells, but high levels can lead to plaque buildup in arteries, increasing the risk of cardiovascular disease.
#12
During which phase of the cardiac cycle does the heart muscle relax and fill with blood?
Diastole
ExplanationDiastole is the phase of the cardiac cycle where the heart muscle relaxes, allowing blood to flow into the heart chambers, preparing for the next contraction.
#13
What is the primary role of potassium in cardiovascular health?
Regulating blood pressure
ExplanationPotassium plays a crucial role in regulating blood pressure by balancing sodium levels and helping blood vessels relax, thus reducing strain on the cardiovascular system.
#14
What is the role of nitric oxide in the cardiovascular system?
Dilating blood vessels
ExplanationNitric oxide acts as a vasodilator in the cardiovascular system, relaxing blood vessels and improving blood flow, which is essential for maintaining healthy blood pressure levels.
#15
Which of the following factors is associated with an increased risk of developing atherosclerosis?
Elevated LDL cholesterol
ExplanationHigh levels of LDL cholesterol are associated with an increased risk of atherosclerosis, as LDL can accumulate in the arteries, forming plaques that narrow and harden them.