#1
Which of the following is not a component of the cardiovascular system?
Liver
ExplanationLiver is not a component; it belongs to the digestive system.
#2
What is the average resting heart rate for adults?
60-80 beats per minute
ExplanationNormal resting heart rate falls within this range.
#3
Which hormone is released by the adrenal glands during the 'fight or flight' response?
Epinephrine
ExplanationEpinephrine triggers physiological changes in stressful situations.
#4
Which blood vessel carries deoxygenated blood from the body back to the heart?
Vein
ExplanationVeins return deoxygenated blood to the heart.
#5
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
ExplanationLeft atrium receives oxygen-rich blood from the lungs.
#6
What is the primary function of red blood cells?
Transport oxygen
ExplanationRed blood cells carry oxygen to tissues and organs.
#7
Which blood vessel carries oxygenated blood away from the heart?
Artery
ExplanationArteries transport oxygen-rich blood from the heart.
#8
Which blood type is considered the universal donor?
O
ExplanationBlood type O can be safely transfused to most recipients.
#9
What is the primary role of platelets in the blood?
Clotting
ExplanationPlatelets aid in blood clot formation to stop bleeding.
#10
What is the name of the largest artery in the human body?
Aorta
ExplanationThe aorta carries oxygen-rich blood from the heart to the body.
#11
What is the medical term for high blood pressure?
Hypertension
ExplanationHypertension is the condition of elevated blood pressure.
#12
Which valve prevents the backflow of blood from the left ventricle to the left atrium?
Mitral valve
ExplanationThe mitral valve ensures blood flows forward.
#13
Which chamber of the heart pumps oxygenated blood to the rest of the body?
Left ventricle
ExplanationThe left ventricle propels oxygen-rich blood into circulation.
#14
What is the medical term for a heart attack?
Myocardial infarction
ExplanationMyocardial infarction results from coronary artery blockage.
#15
Which condition is characterized by the accumulation of fatty deposits on arterial walls?
Atherosclerosis
ExplanationAtherosclerosis narrows arteries, impeding blood flow.