Final answer:
Psychoneuroimmunology is the study of how psychological factors, especially stress, influence the immune system and how stress hormones and telomeres are involved in this process.
Step-by-step explanation:
The study that focuses on built-in limits of cell division in telomeres, the stress hormones in the endocrine system, and the immunological theory is known as psychoneuroimmunology.
This interdisciplinary field investigates how psychological factors, particularly stress, impact the immune system and its functioning.
Chronic and acute stress can have diverse effects on immune health, with influences seen in both humoral and cellular aspects of innate and adaptive responses.
Stress hormones like cortisol can suppress T cell immunity, which demonstrates the intricate communication between the nervous, endocrine, and immune systems.
Furthermore, the research in psychoneuroimmunology provides insights into how early life stress can affect our health similarly to risk factors like smoking or poor diet.