What effect does hormonal change from stress have on the immune system?

• A. It enhances immune function
• B. It disrupts normal immune response
• C. It prevents infection
• D. It has no impact on immunity

Answer: (B)

Hormonal changes that occur in response to stress primarily involve the release of stress hormones such as cortisol and adrenaline. These hormones can have significant effects on the immune system. Specifically, increased cortisol levels, which are characteristic of the body's fight-or-flight response, can suppress various immune functions. This suppression can lead to a reduced efficiency in the immune response, making the body more vulnerable to infections and illnesses.

The disruption in normal immune function can manifest as a decrease in the production of cytokines and a reduction in the activity of immune cells such as T cells and B cells. Over time, chronic stress and the associated hormonal changes can lead to a prolonged state of immune suppression.

In contrast, the other options do not accurately reflect the impact that stress hormones have on the immune system. For instance, hormonal changes from stress do not enhance immune function or prevent infection; rather, they compromise the immune system's ability to respond effectively to pathogens. Additionally, while it might be tempting to say that stress has no impact on immunity, extensive research demonstrates that stress significantly affects immune responses, particularly during periods of chronic stress. Therefore, the hormonal changes from stress clearly disrupt normal immune responses, making the chosen answer accurate.