Inflammatory Response and Leukocyte Extravasation Quiz

What triggers the inflammatory response in the body?

• Excessive exercise

• Physical damage to tissues or presence of pathogens

• Increase in blood pressure

• Decrease in body temperature

Which type of molecule is responsible for the directed movement of cells during inflammation?

• Enzymes

• Chemokines

• Antibodies

• Hormones

What is the primary role of selectins in leukocyte recruitment?

• To produce antibodies

• To induce cytokine release

• To increase blood flow

• To bind specific carbohydrate groups on leukocytes

Which adhesion molecule allows for tighter adhesion of leukocytes to the endothelium?

• ICAMs

• Selectins

• Cytokines

• Integrins

What is the first step in the process of leukocyte extravasation?

• Migration

• Tight binding

• Rolling adhesion

• Diapedesis

Which molecule is involved in the tight binding phase of leukocyte extravasation?

• Histamine

• ICAM-1

• LPS

• P-selectin

What is the role of P-selectin during leukocyte extravasation?

• To increase blood flow

• To trigger cytokine release

• To bind leukocytes to the endothelium

• To degrade extracellular matrix proteins

What process allows leukocytes to cross the endothelial wall?

• Chemotaxis

• Cytokine release

• Diapedesis

• Vasodilation

How do leukocytes find the site of infection once they are in the tissues?

• By random movement

• By following a concentration gradient of chemokines

• By detecting changes in temperature

• By following blood flow

What happens to monocytes in uninfected regions of the body?

• They become resident macrophages

• They remain in the blood

• They transform into neutrophils

• They are eliminated by the immune system