**Question 6****Which white blood cell type is correctly matched with its proper function or feature?**A) ○ neutrophils: primarily works with adaptive immune system as an antigen presenting cellB) ○ basophils: outside the blood, differentiate into macrophages and dendritic cellsC) ○ macrophages: antibody-producing cellsD) ○ dendritic cells: works with adaptive immune system as an antigen presenting cell E) ○ monocyte: promotes inflammatory response via release of specific chemicals such as histamine---No graphs or diagrams are present in the image. **Question: Which white blood cell type is correctly matched with its proper function or feature?**A) neutrophils: primarily works with adaptive immune system as an antigen presenting cellB) basophils: outside the blood, differentiate into macrophages and dendritic cellsC) macrophages: antibody-producing cellsD) dendritic cells: works with adaptive immune system as an antigen presenting cellE) monocyte: promotes inflammatory response via release of specific chemicals such as histamine**Explanation:**- **Option A:** Neutrophils are primarily involved in the innate immune response rather than serving primarily as antigen presenting cells.- **Option B:** Basophils do not differentiate into macrophages and dendritic cells.- **Option C:** Macrophages do not produce antibodies; this is the function of B cells.- **Option D:** Dendritic cells are known to work with the adaptive immune system as antigen presenting cells, helping to activate T-cells.- **Option E:** Monocytes can differentiate into macrophages or dendritic cells and do contribute to inflammation, but histamine is primarily released by basophils and mast cells, not monocytes.

The immune system of the human body consists of white blood cells, antibodies, spleen, thymus, and so on that act to protect microorganisms that may cause infectious diseases. Thereby they act as a body's defense system. The white blood cells also called leukocytes are part of the immune system that helps carry out their function(defense). Most of these cells are produced in the bone marrow, while some are produced in the lymph nodes, thymus, and spleen and are transported through the blood. There are different types of white blood cells in the human body while the function of some white blood cells is explained as follows.The leukocytes based on the presence or absence of granules are divided into two major categories called granulocytes and agranulocytes. Granulocytes consist of granular cytoplasm and the white blood cells basophils, neutrophils and eosinophils are granulocytes. While the cells monocytes, macrophages, dendritic cells, and lymphocytes are agranulocytes that do not contain a granular cytoplasm. Dendritic cells are leukocytes that are derived from the precursors of the bone and travel to all tissues through the blood. These cells are types of antigen-presenting cells that play a major role in the adaptive system by presenting the antigens to the surface of the T cells. These cells thereby act as messengers between the adaptive and innate immune systems. The adaptive immune system is a type of acquired immunity that is obtained after exposure to the disease or pathogen. The dendritic cells are unique antigen-presenting cells that work in the adaptive immune system. Hence the correct option is option D.The options other than option D are considered incorrect because of the following reasons. Option A: Neutrophils are granular leukocytes that function to kill and digest bacteria and other microorganisms by the process of phagocytosis but do not act as antigen-presenting cells. The leukocytes macrophages, B cells, and dendritic cells mostly act as antigen-presenting cells. As the function of neutrophils is not correctly mentioned this option cannot be chosen. Option B: Basophils are granulocytes that are involved in allergic reactions by releasing cytokines and histamines. While monocytes are white blood cells when from the blood to tissues gets differentiated into macrophages and dendritic cells. As the function of basophils is not correctly mentioned this option cannot be chosen. Option C: Macrophages are white blood cells that function to eliminate the antigens by engulfing them. While B-lymphocytes are antigen-producing cells. As the function of macrophages is not correctly mentioned this option cannot be chosen. Option E: Monocytes are white blood cells that phagocytosis antigens like bacteria and viruses; also they get differentiated into macrophages and dendritic cells. Mast cells and basophils are white blood cells that promote inflammatory responses by the release of inflammatory mediators like histamine. As the function of monocytes is not correctly mentioned this option cannot be chosen.