Questions
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Reading 1/2:
(6) Negative reactions to transfusions are not unusual. The recipient may suffer an allergic reaction or be sensitive to donor leukocytes. Some may suffer from an undetected red-cell incompatibility. Unexplained reactions are also fairly common. Although they are rare, other causes of such negative reactions include contaminated blood, air bubbles in the blood, overloading of the circulatory system through administration of excess blood, or sensitivity to donor plasma or platelets.
(7) Today, hospitals and blood banks go to great lengths to screen all blood donors and their blood. All donated blood is routinely and rigorously tested for diseases, such as HIV (which causes AIDS), hepatitis B. and syphilis. When the recipient is a new-born or an infant, the blood is usually irradiated to eliminate harmful elements. Donated blood is washed, and the white blood cells and platelets are removed.
Storing the blood sometimes requires a freezing process. To freeze the red blood cells, a glycerol solution is added. To unfreeze, the glycerol is removed. The ability to store blood for long periods has been a boon to human health.
1) What is the purpose of the writer in this text?
A. to illustrate how blood can be extracted and donated to children
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B. to argue against the benefits of blood donation
C. to provide more information about blood donation in general D. to raise questions about why humans need blood donations
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2) All of the following are mentioned as potential negative reactions to transfusions EXCEPT:
A. red-cell incompatibility
B. allergies
C. sensitivity to donor leukocytes
D. air bubbles in the blood
3) Where in the passage is the best place for the following sentence?
vant finish
the exam.
