What Substance Signals Macropages to Destroy Self-Cells That Have Committed

Question

What substance signals macropages to destroy self-cells that have committed apoptosis?
A)interleukin-1
B)peptidoglycan
C)complement
D)phosphatidylserine

Accepted Answer

When cells undergo apoptosis, phosphatidylserine (PS) is translocated from the inner membrane of the cell to the outer membrane. This acts as a signal for macrophages to engulf and remove the dying cell.