Jonathan tripped on a sprinkler during a game of flag football and felt a sharp pain as he broke his ankle. Later on, after he returned home from the emergency room with a new cast, he felt a dull, aching pain in his broken ankle. Which of the following is the best explanation for Jonathan's experience?
A. The sharp pain resulted from the transmission of messages along C fibers, and as the rate of signaling dropped, the quality of the pain changed to dull and aching.
B. The sharp pain resulted from the activation of nociceptors that respond to mechanical injury, whereas the dull pain resulted from the activation of nociceptors that respond to chemicals released by damaged cells.
C. The sharp pain resulted from the transmission of messages along C fibers, and the dull pain resulted from the transmission of messages along A fibers.
D. The sharp pain resulted from the transmission of messages along A fibers, and the dull pain resulted from the transmission of messages along C fibers.
Answer: D
You might also like to view...
Most modern American parents are likely to view their children as being
a. competent. c. in need of protection. b. innocent. d. dependent.
You hear a speaker at a scientific seminar say something that sounds like, "It is easy to wreck a nice beach." You know that the topic of the talk is language comprehension, so you decide that what the speaker really said was, "It is easy to recognize speech." In making this inference, you are primarily employing
A. bottom-up processing. B. the word superiority effect. C. convergent thinking. D. top-down processing.
Sid is being treated for depression related to his sexual performance. Which drug might be the most dangerous choice for him?
A. Paxil B. Zoloft C. Adapin D. Tofranil
Migraine headaches often respond to drugs that
a) relax muscles. b) treat infection. c) constrict arteries in the scalp. d) increase cerebral electrical activity.