#1
Which of the following is not a component of the cardiovascular system?
Kidneys
ExplanationKidneys are not part of the cardiovascular system; they are part of the urinary system.
#2
What is the main function of red blood cells (erythrocytes)?
Carrying oxygen to tissues
ExplanationRed blood cells transport oxygen to body tissues.
#3
Which blood type is known as the 'universal donor'?
O
ExplanationBlood type O is considered the universal donor as it can be given to recipients of any blood type.
#4
Which of the following is not a risk factor for cardiovascular disease?
Regular exercise
ExplanationRegular exercise is beneficial and reduces the risk of cardiovascular disease.
#5
What is the function of platelets in the blood?
Assisting in blood clotting
ExplanationPlatelets help in blood clotting to prevent excessive bleeding.
#6
Which chamber of the heart pumps oxygenated blood to the rest of the body?
Left ventricle
ExplanationThe left ventricle pumps oxygenated blood to the body through the aorta.
#7
What is the name of the process by which blood cells are formed?
Hematopoiesis
ExplanationHematopoiesis is the process of blood cell formation in the bone marrow.
#8
What is the average volume of blood in an adult human body?
5-6 liters
ExplanationAn adult human body typically contains 5-6 liters of blood.
#9
What is the medical term for a heart attack?
Myocardial infarction
ExplanationA heart attack is medically known as a myocardial infarction, caused by blocked blood flow to the heart.
#10
What is the name of the condition characterized by high levels of cholesterol in the blood?
Hypercholesterolemia
ExplanationHypercholesterolemia refers to high levels of cholesterol in the blood, increasing the risk of heart disease.
#11
Which of the following hormones regulates blood pressure?
Aldosterone
ExplanationAldosterone helps regulate blood pressure by controlling sodium and potassium levels.