#1
Which blood vessel carries oxygenated blood away from the heart to the body?
Artery
ExplanationCarries oxygen-rich blood to body tissues.
#2
What is the main function of capillaries in the circulatory system?
To exchange nutrients and gases with tissues
ExplanationFacilitates exchange of gases and nutrients with body tissues.
#3
What is the term for the smallest branches of arteries?
Arterioles
ExplanationSmallest arteries leading to capillaries.
#4
Which of the following is NOT a major type of blood vessel?
Lymphatic vessel
ExplanationLymphatic vessels belong to the lymphatic system.
#5
What is the main function of the lymphatic system in relation to the vascular system?
To return excess tissue fluid to the bloodstream
ExplanationReturns excess fluid to blood vessels.
#6
Which of the following is NOT a component of the cardiovascular system?
Lungs
ExplanationLungs belong to the respiratory system.
#7
What is the function of valves in the veins?
To prevent backflow of blood
ExplanationPrevents blood from flowing backward.
#8
What is the function of hemoglobin in red blood cells?
To transport oxygen
ExplanationBinds to oxygen for transport.
#9
What is the medical term for high blood pressure?
Hypertension
ExplanationAbnormally high blood pressure.
#10
Where is the carotid artery located?
In the neck
ExplanationSupplies blood to the head and neck.
#11
Which blood vessel has the thickest walls and is responsible for maintaining blood pressure?
Artery
ExplanationHas thick walls to withstand high blood pressure.
#12
Which of the following is a risk factor for cardiovascular disease?
Smoking
ExplanationIncreases risk of heart diseases.
#13
Which of the following statements about veins is true?
Veins have valves to prevent backflow of blood
ExplanationValves prevent blood from flowing backward in veins.
#14
Which of the following factors contributes to the formation of a blood clot?
High platelet count
ExplanationIncreased platelets lead to clot formation.
#15
Which of the following is NOT a risk factor for developing atherosclerosis?
Regular physical activity
ExplanationRegular physical activity reduces risk of atherosclerosis.