What body responses can be observed that may indicate a person is experiencing pain?

Increased pulse and respirations are common physiological responses that can indicate a person is experiencing pain. When someone is in pain, the body's stress response system becomes activated, often resulting in a rise in heart rate and respiratory rate. This is part of the fight-or-flight response, which prepares the body to confront or escape from a perceived threat.

In contrast, the other options reflect opposite reactions to discomfort or distress. An improved appetite suggests a state of comfort and well-being, not pain. Heightened mobility would typically indicate someone is feeling well enough to move freely, rather than being hindered by pain. A calm demeanor generally signifies a lack of stress or discomfort, which is the opposite of what one would expect from someone in pain. Therefore, the observed increased pulse and respirations are key indicators that can help caregivers recognize when a patient may be suffering.