Stress and Immune Cell Activity
Brief or acute stress can temporarily enhance the activity of the immune system. This effect involves multiple components of the immune system, including key cell types.
Immune Cell Roles
- Macrophages: These cells act as the immune system's first responders, engulfing pathogens and cellular debris. Brief stress can increase their phagocytic activity and antigen-presenting capabilities.
- T cells: These lymphocytes are crucial for cell-mediated immunity. They help coordinate the immune response and fight infected cells. Acute stress can boost T cell proliferation and their ability to attack targets.
- B cells: Responsible for producing antibodies to neutralize pathogens, B cells are central to humoral immunity. Studies suggest brief stress can enhance B cell antibody production.
The enhancement of activity across macrophages, T cells, and B cells collectively demonstrates how brief stress can bolster immune system function.
Important Questions from Immune System
- Which of the following is correct about the impact of stress on immune system of an individual?
- Which components of psychoneuro immunological system is not effected by glucocorticoids
- Choose the correct sequence of response of immune system
A. Synthesizes antibodies which comprises immunoglobulins
B. Immune system identifies foreign substances in the body
C. Immunoglobulins specifically designed to bind the antigens
D. Destroy the antigens
Choose the correct answer from the options given below: There are number of specific T cell surface molecules involved in various functions of adaptive immune response. Column X represents a list of T cell surface molecules and Column Y with the possible functional characteristics:
Column X
Column Y
A.
T cell receptor
(i)
binds to CD40 on B cells and APCs and triggers activation of APCs and activation/differentiation of B cells.
B.
CD28
(ii)
binds to MHC class I molecules and restricts I cytotoxic cells to recognizing only peptide presented on MHC class I
C.
CD8
(iii)
binds to B7 - 1, 2 or CD80/86 on B cells and APCs, which triggers T cell activation.
D.
CD154
(iv)
consists of two poly-peptide chains α and β and some consist of poly-peptide chains γ and δ.
Which of the following option has all correct matches?
Which one of the following influenza A virus subtypes caused severe avian flu and was responsible for disease outbreak in the year 1997 in Hong Kong?
