Final answer:
The cell type largely responsible for type I hypersensitivity responses is mast cells, which release inflammatory molecules such as histamine. Type II hypersensitivities are characterized by cytotoxicity caused by antibodies targeting antigens. Antibodies are produced by plasma cells, differentiated from B lymphocytes.
Step-by-step explanation:
Which Cell Type is Responsible for Type I Hypersensitivity?
The type of cell largely responsible for type I hypersensitivity responses is c) Mast cells. Type I hypersensitivity refers to immediate allergic reactions, commonly known as allergies, which can range from mild symptoms like hives to severe reactions such as anaphylaxis. Mast cells play a crucial role in this immune response by releasing inflammatory molecules like histamine upon encountering an allergen.
Inflamatory molecules are released by mast cells in type I hypersensitivities; type II hypersensitivities, on the other hand, are characterized by cell lysis or cytotoxicity due to strong antibody reactions against antigens on cell surfaces.
Antibodies are essential components of the immune system, produced by plasma cells which are differentiated forms of B lymphocytes. These antibodies are responsible for targeting and neutralizing pathogens.