Patient Care Technician (PCT) AAH Practice Exam

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What is the role of arteries in the cardiovascular system?

Carry blood back to the heart
Transport oxygenated blood away from the heart
Filter toxins from blood
Regulate blood pressure

The correct answer is: Transport oxygenated blood away from the heart

The role of arteries in the cardiovascular system is primarily to transport oxygenated blood away from the heart to various tissues and organs throughout the body. Arteries are muscular and elastic vessels that withstand and help regulate the high pressure created by the heart as it pumps blood. This function is crucial because oxygenated blood carries essential nutrients and oxygen necessary for the survival of tissues, while also facilitating the removal of carbon dioxide and other metabolic wastes by sending blood to the appropriate organs for processing. In contrast, other choices describe functions carried out by different parts of the cardiovascular system. Veins are responsible for carrying blood back to the heart, and while they also transport some deoxygenated blood, their role is distinct from that of arteries. Filtering toxins from the blood is primarily the function of the kidneys, not the arteries, as they are responsible for waste removal and processing of the blood. Regulation of blood pressure involves various mechanisms, including the constriction and dilation of blood vessels, but the specific function of arteries is to transport oxygenated blood from the heart.