Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 28

After an injury, you feel two different kinds of pain sensations: at first, there is sharp, localized pain, which is followed by a duller, more generalized pain. The receptors for pain are (a) _____, which send impulses to two areas of the brain, specifically the (b) _____ and _____ If you rub an injured area or become totally absorbed in another activity, you may experience a reduction of pain, which is explained by the (c) _____ Immediately following a serious injury or great physical stress, the brain produces pain-reducing chemicals called (d) _____.