Pain can be very difficult to control in a critical care patient, and pain may be mistaken for anxiety or another condition. Mechanical, chemical, and thermal stimuli results in pain perception. The patient endorphins can also suppress pain. For this discussion question please address the following questions: What are the normal physiological responses to pain? What is nociceptors and why do they not adapt to pain? What aspect of the critical care unit could cause pain? What can you do as a nurse to change some of these aspects?