You might think of your teeth as tools, like built-in knives and forks, but if they aremere tools, why do they feel pain and wouldn't it be better if they could just 26.() underany condition? In spite of our27.()discomfort, it turns out there's a good reason ourteeth are so sensitive. Tooth pain is a 28.()mechanism that ensures when a tooth isbeing damaged we'll notice and do something about itIf we eat something too hot or too cold, or if the tooth is worn down enough where thetissue 29.()is exposed, all of those things cause pain, and then the pain causes theperson not to use that tooth to try to protect it a little bit more. So it's really a protectivemechanism more than anything else. If teeth didn't feel pain, we might30.( )to usethem in situations that damage them, and for humans, damaging 31.( ) teeth is a problembecause.unlike crocodiles we can't32.( )themTeeth have three lavers. only one of which-the innermost laver of the tooth-can hurt. asthat layer of the tooth33.( )both blood vessels and nerves Pain is the only feeling towhich the nerves in that layer respond. Whereas people with tooth sensitivity may complainfor example, of tooth pain 34.( ) by eat or cold the nerves in the inner laver don't sensetemperature. Rather,they feel pain, which may be 35.( )with, say, drinking somethingvery cold.A)adult B) associated C)chew D) contains E) continue F) defense G) dental H) downward I) emotionalJ) impliesK)mammalL) replaceM) swallowN) triggeredO)underneath
You might think of your teeth as tools, like built-in knives and forks, but if they aremere tools, why do they feel pain and wouldn't it be better if they could just 26.() underany condition? In spite of our27.()discomfort, it turns out there's a good reason ourteeth are so sensitive. Tooth pain is a 28.()mechanism that ensures when a tooth isbeing damaged we'll notice and do something about itIf we eat something too hot or too cold, or if the tooth is worn down enough where thetissue 29.()is exposed, all of those things cause pain, and then the pain causes theperson not to use that tooth to try to protect it a little bit more. So it's really a protectivemechanism more than anything else. If teeth didn't feel pain, we might30.( )to usethem in situations that damage them, and for humans, damaging 31.( ) teeth is a problembecause.unlike crocodiles we can't32.( )themTeeth have three lavers. only one of which-the innermost laver of the tooth-can hurt. asthat layer of the tooth33.( )both blood vessels and nerves Pain is the only feeling towhich the nerves in that layer respond. Whereas people with tooth sensitivity may complainfor example, of tooth pain 34.( ) by eat or cold the nerves in the inner laver don't sensetemperature. Rather,they feel pain, which may be 35.( )with, say, drinking somethingvery cold.A)adult B) associated C)chew D) contains E) continue F) defense G) dental H) downward I) emotionalJ) impliesK)mammalL) replaceM) swallowN) triggeredO)underneath
