【单选题】【消耗次数：1】
酶原激活的生理意义不包括
①
避免细胞产生的酶对细胞进行自身消化
②
使酶在特定的部位和环境中发挥作用
③
可视为酶的储存形式。
④
保护酶本身不被降解
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胰液中的蛋白水解酶初分泌时以酶原形式存在的主要意义是
①
抑制蛋白酶的分泌
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促进蛋白酶的分泌
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维持胰蛋白酶的分泌速度
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保护胰腺组织不被自身消化
⑤
保证蛋白酶在特定部位发挥消化作用
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