The prostaglandins further increase the ........... of the nociceptors not only to .......... but also to stimulate agents, such as ......... released from damaged cells & ......... released from mast cells.
a) Sensitivity, pain, bradykinin, histamine
b) Resistance, touch, serotonin, dopamine
c) Threshold, pressure, acetylcholine, norepinephrine
d) Tolerance, vibration, cortisol, insulin
