Mast Cells: Strategic Granulocytes

The video tutorial covers the roles of mast cells, basophils, and eosinophils in immunity and allergic reactions. It explains their development, circulation, and activation processes. Mast cells are highlighted for their strategic location and role in early immune response, releasing mediators like histamine and cytokines. The tutorial also discusses mast cell subtypes, receptors, and disorders like mastocytosis and activation syndrome.

Which of the following cell types mature in the bone marrow before entering the bloodstream?

• Neutrophils

• Eosinophils

• Basophils

• Mast cells

What is the primary role of mast cells in the immune response?

• To produce antibodies

• To recognize danger signals and orchestrate early immune responses

• To destroy pathogens directly

• To circulate in the bloodstream

Which subtype of mast cells is primarily found in the mucosa of the respiratory and gastrointestinal tract?

• Eosinophils

• Basophils

• MCT cells

• MCTC cells

What is the function of tryptase in mast cells?

• To act as a receptor for stem cell factor

• To serve as an enzymatic mediator

• To bind to antigens

• To circulate in the bloodstream

Which receptor is involved in the activation of mast cells during allergic reactions?

• CD64

• CD32A

• FC epsilon R1

• CD117

What condition is caused by activating mutations in the kit gene leading to excessive mast cell activation?

• Mastocytosis

• Anaphylaxis

• Cancer

• Autoimmune disorder

Which cytokine is critical for eosinophil development and is produced by mast cells?

• IL 13

• IL 10

• IL 6

• IL 3