Answer: the study only examined the behavior of macrophages in response to uninjured nerve cells and astrocytes.
Explanation:
The study or research here considered mostly what macrophages are responsive to in microenvironment. The location where an injury occurs produces a different environment from the resting tissue. The study was only considerate on microphage migration in response to conditioned media from resting cells
American because we live in a society where money is dominant and everybody needs it to survive and in East Africa you know you don't really have anything real life quality is really like low