Final answer:
The statement that 'pain is objective' is not true regarding pain perception; pain is subjective and varies from person to person, impacted by emotional and psychological states.
Step-by-step explanation:
The statement about pain perception that is NOT true is 'pain is objective'. Pain is a highly subjective experience, meaning it varies greatly from one person to another. Factors like emotional and psychological states can profoundly impact the experience of pain. Contrary to being objective, pain is often described as an unpleasant sensory and emotional experience. Effective pain assessment often relies on subjective self-reporting by the individual experiencing the pain, which can include the Wong-Baker Faces pain-rating scale or measurements of skin conductance fluctuations to try to provide an objective measure of a subjective sensation.
Nociceptors are the type of receptor cells responsible for transducing pain stimuli, which can be activated by various stimuli such as injured tissues. Also, the nociceptive system has several phases and can be triggered by particular stimuli that cause tissue damage. The perception of pain involves complex processing that includes the moment the nociceptors are stimulated to the processing in the brain where the sensation of pain is consciously realized. The propagation of the axon potential is one reason why the perception of pain might be delayed, as it takes time for the signals to travel from the site of injury to the cerebral cortex.