1. Explain the role of blood vessels in homeostasis.
2. Mr. Ackah, a retired teacher had been recording consistent increase of blood pressure for the past five years. What accounted for the rise in his blood pressure?
3. For several years, researchers have attempted to produce ab artificial blood for transfusions. Artificial blood would most likely to be safer and more readily available than human blood. While the artificial blood might not have all the characteristics of a human blood, it would be useful on the battlefield and in emergency situations. Which characteristics of normal blood must artificial blood have to be useful and which would probably be too difficult to reproduce.
4. Rh D-negative individuals generate an immune response when they are exposed to the Rh-D antigen. However, incompatibility in the ABO blood group system occurs naturally in the absence pf exposure to the A or B antigen in the blood from another individual. Why do individuals produce an immune response the first time they encounter the A or B antigen as an adult?
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