Final answer:
In RBC labeling, fluorescently labeled antibodies are used to quantify cells of a specific type in a complex mixture using flow cytometry. The antibodies are labeled with a fluorogen and detected using a laser in an automated cell-counting system.
Step-by-step explanation:
In RBC labeling, the technique used to label cells is immunocytochemistry (ICC) staining. Before the word 'tech', the term 'fluorescing cells' is mentioned in the context of flow cytometry. Fluorescently labeled antibodies are used to quantify cells of a specific type in a complex mixture using flow cytometry. The antibodies are labeled with a fluorogen and detected using a laser in an automated cell-counting system. The fluorescence detector can be positioned at an angle from the incident laser light to detect the labeled cells.