Physiology of Basophils, Mast Cells, & Eosinophils

The video tutorial discusses various types of white blood cells, focusing on basophils, mast cells, and eosinophils. Basophils and mast cells have similar functions but differ in location, with basophils in the blood and mast cells in tissues. They release chemicals like histamine, heparin, prostaglandins, pyrogens, and chemotactic factors to create an environment conducive to immune defense. Eosinophils, another type of granulocyte, directly attack parasites by releasing cytotoxic chemicals. The video explains the roles of these cells and the chemicals they release in the immune response.

What is the primary difference between basophils and mast cells?

• Their location in the body

• Their ability to perform phagocytosis

• The type of chemicals they release

• Their function in the immune system

Which chemical released by basophils and mast cells promotes vasodilation?

• Pyrogens

• Heparin

• Histamine

• Prostaglandins

What is the role of heparin in the immune response?

• Acts as an anticoagulant

• Increases vascular permeability

• Attracts immune cells

• Promotes blood clotting

How do prostaglandins contribute to the immune response?

• By attracting immune cells

• By promoting vasodilation and pain

• By acting as an anticoagulant

• By increasing vascular permeability

What is the purpose of a moderate fever in fighting infections?

• To slow down the immune response

• To make the body feel better

• To reduce metabolic rate

• To create an environment that helps fight infections

What do chemotactic factors released by mast cells do?

• Promote vasodilation

• Attract other immune cells

• Increase vascular permeability

• Act as anticoagulants

What type of cells are attracted by chemotactic factors?

• Neutrophils

• Platelets

• Epithelial cells

• Red blood cells

What is the primary target of eosinophils?

• Parasites

• Fungi

• Bacteria

• Viruses

How do eosinophils identify parasites?

• By binding to Ige antibodies

• By detecting chemical signals

• By recognizing surface antigens

• By performing phagocytosis

What happens to a parasite after eosinophils release cytotoxic chemicals?

• It is engulfed by macrophages

• It is marked for destruction

• It becomes resistant to attack

• It breaks into smaller pieces