Which of the following statements is the most appropriate for sickle cell anemia?
A. It cannot be treated with iron supplements.
B. It is a molecular disease.
C. It confers resistance to acquiring malaria.
D. All of the above.
Select your answer:

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The Vascular System and Blood Flow › ViewWhat is the main function of veins in the cardiovascular system?
A. Regulating blood distribution to the various tissues
B. Carrying oxygenated blood away from the heart
C. Exchanging gases and nutrients with the tissues
D. Returning blood to the heart for another trip throughout the vascular system
Hormones › View
Insulin is secreted when…
A. The blood glucose level is high after we eat
B. The blood glucose level is low after we eat
C. The blood glucose level is low after we exercise
D. The blood glucose level is high after we exercise