Which of the following is a physical effect of stress?

The physical effect of stress that is recognized is the weakened immune system. When an individual experiences chronic stress, the body’s physiological response can lead to changes in various systems, particularly the immune response. Stress triggers the release of hormones like cortisol, which, when elevated for prolonged periods, can suppress the effectiveness of the immune system. This suppression makes the body more vulnerable to infections and diseases, illustrating a clear physical consequence of sustained stress.

In contrast, the other options suggest positive effects that are not typically associated with stress. Increased creativity and enhanced memory may occasionally occur in short bursts of stress (known as eustress), but chronic stress usually hinders cognitive functions. Similarly, improved sleep quality is generally compromised during stressful periods, as stress often leads to insomnia or disrupted sleep patterns. Thus, the weakened immune system is not just a stress response but a well-documented physical effect that underscores the broader implications of stress on health.