疼痛阈（pain threshold)

ful for humans to hear. Do the data in the figure support this hypothesis？

A.Yes, because the threshold of pain is relatively constant with changes in frequency.

B.Yes, because as frequency increases above 105 Hz, the threshold of pain increases.

C.No, because humans cannot hear sounds at 105 Hz.

D.No, because the threshold of pain is relatively constant with changes in frequency.

阈电位(threshold potential)

A．the role of faith in the killing of pain

B．how the brain works when one is conscious

C．if religious faith erases more pain than secular faith

D．why someone has a higher pain threshold than others

肾糖阈(renal glucose threshold)

感觉辨别阈(discrimination threshold)

阈强度(threshold intensity)

肾糖阈(renal threshold for glucose)

阈性状[threshold character(trait)]

ganic cause for the pain. They tend to interpret the term "psychogenic" to mean that they are complaining of nonexistent symptoms. They need to be educated about the fact that many forms of pain have no underlying physical cause but are the result, as mentioned earlier, of tension, stress, or hostile factors in the general environment. Sometimes a pain may be a manifestation of "conversion hysteria".

Obviously, it is folly for an individual to ignore symptoms that could be a warning of a potentially serious illness. Some people are so terrified of getting news from a doctor that they allow their malaise to worsen, sometimes past the point of no return. Total neglect is not the answer to hypochondria. The only answer has to be increased education about the way the human body works; so that more people will be able to steer an intelligent course between promiscuous pill popping and irresponsible disregard of genuine symptoms.

Of all forms of pain, none is more important for the individual to understand than the "threshold" variety. Almost everyone has a telltale ache that is triggered whenever tension or fatigue reaches a certain point. It can take the form. of a migraine-type headache or a squeezing pain deep in the abdomen or cramps or a pain in the lower back or even in the joints.

The individual who has learned how to make the correlation between such threshold pains and their cause doesn't panic when they occur; he or she does something about relieving the stress and tension. Then, if the pain persists despite the absence of apparent cause, the individual will telephone the doctor.

Which of the following is TRUE？

A．A pain can only be caused by physical harm.

B．Some people are complaining of a pain which does not exist.

C．A pain can be caused by psychogenic factors.

D．Educated people do not complain of nonexistent pain.