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Functions of Blood and White Blood Cell Types Quiz

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Functions of Blood and White Blood Cell Types Quiz

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Questions and Answers

What is the function of veins in the circulatory system?

Pump blood to the lungs

Supply oxygen to the body tissues

Allow blood to flow towards the heart (correct)

Contain blood moving away from the heart

Which vessels have the thickest smooth muscle layer?

Lymphatic vessels

Capillaries

Veins

Arteries (correct)

What initiates the heartbeat in the human body?

AV node (atrioventricular node)

Purkinje fibers

SA node (sinoatrial node) (correct)

Bundle of His

In which vessel is blood pressure typically the highest?

Aorta Signup and view all the answers

What is the primary function of lymphatic vessels in the body?

Carry white blood cells Signup and view all the answers

What is the main function of the tunica externa in arteries and veins?

Connective tissue that gives vessel shape and attaches it to tissue Signup and view all the answers

What percentage of a centrifuged blood sample is composed of formed elements?

45% Signup and view all the answers

What is the primary function of basophils in the blood?

Release histamine and heparin Signup and view all the answers

From where do platelets originate?

Megakaryoblasts Signup and view all the answers

What force is responsible for moving blood out of arterial capillaries?

Hydrostatic pressure of the blood Signup and view all the answers

Which hormone stimulates the production of erythrocytes?

Erythropoietin Signup and view all the answers

What is the composition of hemoglobin and its primary function?

Iron-based molecule that carries oxygen Signup and view all the answers