According to the video, children usually speak their first words ____________.
a. around the age of 6 months.
b. some time around their first birthday.
c. around the age of 2.
d. some time between age 2 and 3.
Answer: b. some time around their first birthday.
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Participants should not be offered information about the results of the study.
Answer the following statement true (T) or false (F)
The main source of testosterone in males is supplied by which gland?
a. pineal b. pituitary c. adrenal d. testes
Autism spectrum disorder usually becomes apparent a. at birth
b. within the first few years of life. c. between the ages of three and six years. d. at puberty.
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.