脑缺血一再灌注损伤时下列哪一种物质增加（）。
A.糖原
B.AFP
C.cAMP
D.葡萄糖
E.磷酸肌酸
参考答案：C
解析：脑缺血后短时间内ATP，CP、葡萄糖、糖原等均减少，乳酸明显增加环腺苷酸（cAMP）在缺血30分钟时增加2．2倍，环乌苷酸（cGMP）则减少53%恢复血流15分钟后cAMP进一步增加，为缺血前的21倍，cGMP进一步下降21%这一情况提示缺血及再灌注时过氧化反应增强，因而cAMP上升导致磷脂酶激活，使磷脂降解，游离脂肪酸增多，缺血后血流再灌注时，自由基产生增加，与游离脂肪酸作用而使过氧化脂质生成增多，能引起细胞和组织的损伤
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| Tony loved basketball. One afternoon on his way to a basketball game, he was walking and dreaming about playing college 1 the next year. Suddenly a car hit him and he was thrown three 2 into the air. Tony woke up in a 3 room. When the doctor told him that both his legs were broken, he knew his college basketball dreams were 4 . Tony did what the doctors told him. 5 it didn't work when he left the hospital,Tony was sent to a rehab (康复) center. A week after he arrived there, he met Sunny Chen. Sunny used to be a coach. His legs were hurt 6 in a skating accident. Though he couldn't move his legs, Sunny became a coach of a basketball 7 called the Suns. It was a on-wheelchair basketball team, because 8 on the team played from a wheelchair. Sunny invited Tony to 9 the game. Tony played badly, but for the 10 time since the accident, he stopped feeling sorry for himself. After becoming a part of the Suns, Tony improved quickly. Basketball Was like 11 for him. Tony was much better than before. When Tony became sad or 12 , Sunny was there to help him. The day 13 Tony left the center, he had dinner with Sunny. He asked Sunny 14 he could be so happy, even with his broken legs. Sunny 15 and said, "It's really quite easy. When you keep your face to the sun,the shadows (阴影) fall behind." | ||||
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