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5.单选题(3分)Which of the following conditions can cause taste?A. Areas without taste buds on the tongueB. The mouth that can not produce salivaC. You drool when you see foodD. Eating substances that are insoluble in saliva

5.单选题(3分) Which of the following conditions can cause taste?

A. Areas without taste buds on the tongue

B. The mouth that can not produce saliva

C. You drool when you see food

D. Eating substances that are insoluble in saliva

题目解答

答案

C. You drool when you see food

解析

本题考查对味觉产生条件的理解。解题的关键在于分析每个选项与味觉产生之间的关系。

  • 选项A:舌头上没有味蕾的区域。味蕾是味觉感受器,没有味蕾的区域无法感受味觉刺激,所以不能引起味觉,该选项不符合要求。
  • 选项B:不能产生唾液的口腔。唾液在味觉感受过程中起着重要作用,它可以帮助溶解食物,使食物中的化学物质能够与味蕾接触,从而产生味觉。如果口腔不能产生唾液,食物无法很好地溶解,就难以刺激味蕾产生味觉,该选项不符合要求。
  • 选项C:看到食物时流口水。当我们看到食物时,视觉信号会传递到大脑,大脑会引发一系列生理反应,包括唾液分泌。而唾液的分泌是为了后续进食时能够更好地感受食物的味道,这是味觉产生过程中的一个前期准备阶段,说明身体已经开始为感受味觉做准备,所以该选项符合能引起味觉相关条件的描述。
  • 选项D:食用不溶于唾液的物质。味觉的产生依赖于食物中的化学物质溶解在唾液中,然后刺激味蕾。如果物质不溶于唾液,就无法与味蕾充分接触,不能刺激味蕾产生神经冲动,也就无法引起味觉,该选项不符合要求。

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