Which of the following is not a type of cell associated with mucosal lymphoid tissue?
Macrophages
Red blood cells
Monocytes
Dust cells
The Correct Answer is B
A. Macrophages are present in mucosal lymphoid tissue and play a role in immune surveillance, phagocytosis, and antigen presentation.
B. Red blood cells are not associated with mucosal lymphoid tissue. They are primarily involved in oxygen transport and do not play a direct role in the immune functions of mucosal lymphoid tissue.
C. Monocytes are a type of white blood cell that can differentiate into macrophages in tissues, including mucosal lymphoid tissue.
D. Dust cells are a type of macrophage found in the lungs, often associated with inhaled particles, and can also be present in mucosal lymphoid tissue.
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Related Questions
Correct Answer is C
Explanation
A. Neutrophils are a type of white blood cell that primarily responds to bacterial infections and perform phagocytosis, not specifically attacking tumor or virus-infected cells.
B. Regulatory T cells help regulate the immune response and prevent excessive immune activity, but they do not directly attack tumor or virus-infected cells.
C. Natural killer (NK) cells are a type of lymphocyte that plays a key role in the body's defense against tumor cells and virus-infected cells by directly attacking and destroying them.
D. Memory T cells are responsible for "remembering" a previous pathogen, enabling a quicker response upon future exposure, but they do not directly attack tumor or virus-infected cells.
Correct Answer is ["B","C"]
Explanation
A. The pertussis vaccine (also known as the whooping cough vaccine) is a bacterial vaccine, not a viral vaccine. It is designed to protect against Bordetella pertussis bacteria.
B. The polio vaccine is a viral vaccine that protects against the poliovirus, which causes polio.
C. The Varicella MMR refers to a combination vaccine that includes varicella (chickenpox), measles, mumps, and rubella. This is a viral vaccine as it protects against viral infections.So, Polio vaccine and Varicella MMR are viral vaccines.
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