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Read the following list carefully .........

Read the following list carefully ........ Neutrophils, erythrocytes, monocytes, macrophages, B iymphocyte , NK cells, T lymphocytes, thrombocytes.
How many of the above cells constitute cellular barrier of innate immunity ?

A

Three

B

Four

C

Five

D

Six

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many of the listed cells constitute the cellular barrier of innate immunity, we will analyze each cell type mentioned in the question: 1. **Neutrophils**: These are a type of white blood cell that play a crucial role in the innate immune response. They are among the first responders to sites of infection and are involved in phagocytosis. **(Innate immunity)** 2. **Erythrocytes**: These are red blood cells responsible for transporting oxygen throughout the body. They do not play a role in the immune response. **(Not part of innate immunity)** 3. **Monocytes**: These are another type of white blood cell that can differentiate into macrophages and dendritic cells. They are part of the innate immune system and help in phagocytosis and antigen presentation. **(Innate immunity)** 4. **Macrophages**: These are differentiated monocytes that are essential for innate immunity. They engulf and digest pathogens and dead cells. **(Innate immunity)** 5. **B lymphocytes**: These cells are primarily involved in the adaptive immune response, producing antibodies. They do not constitute the innate immune barrier. **(Not part of innate immunity)** 6. **NK cells (Natural Killer cells)**: These are a type of lymphocyte that plays a role in the innate immune response by targeting and killing virus-infected cells and tumor cells. **(Innate immunity)** 7. **T lymphocytes**: These are also part of the adaptive immune response and are responsible for cell-mediated immunity. They do not contribute to the innate immune barrier. **(Not part of innate immunity)** 8. **Thrombocytes (Platelets)**: These are involved in blood clotting and do not have a direct role in the immune response. **(Not part of innate immunity)** Now, let’s summarize the findings: - Cells that are part of innate immunity: **Neutrophils, Monocytes, Macrophages, NK cells**. - Cells that are NOT part of innate immunity: **Erythrocytes, B lymphocytes, T lymphocytes, Thrombocytes**. Thus, the total number of cells from the list that constitute the cellular barrier of innate immunity is **4**. **Final Answer**: 4 ---
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