How does stress impact immune response?

• A. It constantly enhances immune function
• B. It suppresses immune function and increases inflammation
• C. It has no effect on immune function
• D. It solely increases susceptibility to allergies

Answer: (B)

Stress has a well-documented impact on the immune system, primarily by suppressing immune function and increasing inflammation. When an individual experiences stress, the body responds by releasing stress hormones, such as cortisol and adrenaline. While short-term stress responses can enhance certain immune functions, chronic stress generally leads to a reduction in the efficacy of the immune system.

Cortisol, in particular, is known to have immunosuppressive effects. It inhibits the production of cytokines, which are crucial for initiating and regulating immune responses. This suppression can lead to an increased vulnerability to infections, as the body is less able to mount an effective defense against pathogens. Additionally, chronic stress can promote prolonged inflammation, which is associated with various health issues, including autoimmune disorders and chronic inflammatory states.

The other options do not accurately reflect the scientific understanding of the relationship between stress and immune function. Stress does not solely enhance immune function nor does it have no impact on immunity at all. It's also incorrect to say that stress solely increases susceptibility to allergies, as this response does not encapsulate the broad range of immune effects that stress can induce.