21. The Immune System

In the inflammatory response, which immune cells are the first to begin the immune response to an injury?

Which of the following is needed for vasodilation and diapedesis to occur at an infection site?

Which immune cells are responsible for removing dead or damaged host material at an injury site?

Match the scenario to the step of the inflammatory response it belongs in. 

1. Tissue Damage & Infection. 

2. Release of Inflammatory Mediators & Cytokines. 

3. Vasodilation and Diapedesis. 

4. Removal of Invading Microbes and Damaged Tissue.

_____ Local mast cells release histamines and cytokines when encountering an invading microbe. 

_____ Neutrophils destroy the invading microbes found in the injury site. 

_____ Peter accidentally cuts his finger with a kitchen knife. 

_____ Fluid full of plasma, proteins and immune cells exits the blood stream at injury site. 

_____ Macrophages remove the epidermis and dermis cells damaged by the injury. 

_____ The blood vessels in the region of the injury dilate releasing immune cells and proteins. 

_____ Pathogenic bacteria enter the host’s body.

The attraction of leukocytes to the area on inflammation is referred to as