NACA Animal Control Officers Practice Test

When someone is surprised, it is common to observe their eyebrows raised. This reaction is part of a universal expression of surprise, which tends to involve the activation of specific facial muscles. The raising of eyebrows facilitates a wider field of vision and opens the eyes more, allowing for increased perception of the unexpected event.

This facial movement is a key component of the surprise expression and helps communicate the emotion to others. Although other physiological and facial responses, like hand clenching or heart racing, might occur during surprising events, the most distinct and recognizable sign is the raising of the eyebrows. This helps differentiate surprise from other emotions, such as fear or anger, which may involve different facial expressions.