Which physiological reaction may be exhibited after a disaster?

Following a disaster, individuals often experience heightened stress and anxiety due to the traumatic nature of the event. Palpitations, which are sensations of a racing or pounding heartbeat, are a common physiological reaction in response to stress. This reaction is part of the body’s "fight or flight" response, triggering the release of stress hormones like adrenaline and cortisol, which prepare the body to react to perceived danger.

This physiological response can result in various symptoms, including palpitations, as the heart rate increases to supply more oxygen to muscles and vital organs in preparation for action.

The other options reflect responses that are typically not aligned with stress reactions following a disaster. For instance, an increased appetite is more associated with comfort eating or stress relief rather than an immediate stress response, while heightened reflexes can occur in certain situations, they are not a predominant reaction observed in the aftermath of disasters. Loss of vision, on the other hand, would be an unusual and serious response not typically described in common disaster reactions.