In the Context of the Skin Senses,which of the Following

Multiple Choice

In the context of the skin senses,which of the following is true of pain receptors?

A) They are present only in the skin.
B) They differ anatomically for different physical stimuli.
C) They respond not only to physical stimuli,but also to chemical stimuli.
D) They have a lower threshold for firing than receptors for temperature and touch.