问题 单项选择题

致痛物质P物质的激活是由()

A.损伤细胞直接溢出

B.在局部由损伤细胞的酶促合成的物质

C.伤害性感受器本身释放的致痛物质

D.神经细胞释放的物质

E.内分泌腺体释放的物质

答案

参考答案:C

解析:伤害性感受器致痛物质的激活有三种方式:①直接溢出:直接从损伤细胞溢出:K、H、组胺、Ach、5-HT和ATP等;②局部合成:在局部由损伤细胞的酶促合成的物质,或通过血浆蛋白及白细胞游走带入到损伤区的物质:缓激肽(BK)、前列腺素和白三烯等;③自身释放:由伤害性感受器本身释放的致痛物质:P物质。

完形填空

Mrs. Green was very fat. She weighed 100kg, and she    1   heavier every month.

   2   she went to see a doctor. The doctor said, “You    3   to go on a diet(节食), Mrs. Green. I’ve got a food list here.” He gave her a small book and said, “   4   it carefully and eat the things on page 11 every day. Then come back and see me    5   two weeks.”

Mrs. Green cam back two weeks    6  , but she wasn’t thinner and was even

   7  . The doctor was surprised and asked, “Are you eating the things on page 11 of the small book?”

“Yes, doctor,” she answered.

The next day,    8   visited Mrs. Green in the afternoon. He was very  9 

to see her.

“Mrs. Green,” he asked, “why are you eating potatoes and bread? You aren’t on the diet!”

“But doctor,” Mrs. Green answered, “I eat my diet    10   lunch time. This is my tea(下午茶).”

小题1:A. gets            B. is getting             C. was getting

小题2:A. So             B. But                  C. Because

小题3:A. want           B. like                  C. have

小题4:A. Watch          B. Read                 C. Find

小题5:A. behind         B. in                    C. for

小题6:A. ago            B. late                  C. later

小题7:A. fatter          B. thinner                C. taller

小题8:A. her parents      B. her friend             C. the doctor

小题9:A. happy          B. afraid                C. surprised

小题10:A. at            B. on                   C. in

单项选择题