Which of the Following is Likely to Be First on the Scene

Question

Which of the following is likely to be first on the scene of a bacterial infection?
A)macrophages
B)neutrophils
C)T helper cells
D)killer T cells

Accepted Answer

Neutrophils are the first cells to arrive at the site of infection because they are constantly circulating in the blood and are able to quickly migrate out of the bloodstream and into the infected tissue. Macrophages and T cells are also important in fighting bacterial infections, but they arrive later during the immune response.