The following is a list of steps involved in the process of phagocytosis. Which of the following answers indicates these steps in the CORRECT order? 1. Lysosome fuses with the vesicle containing a foreign cell.
2) Wastes from the foreign cell are removed.
3) Foreign cell is surrounded by the cell membrane of the phagocyte.
4) Lysosomal enzymes break down the foreign cell.
5) Foreign cell is contained within a vesicle.
A) 5, 3, 1, 4, 2
B) 3, 5, 2, 1, 4
C) 3, 5, 1, 4, 2
D) 2, 4, 1, 5, 3
E) 3, 1, 5, 4, 2

Question

Quizplus · Accepted Answer

In phagocytosis, the foreign cell is first surrounded by the cell membrane of the phagocyte (step 3), forming a vesicle (step 5). This vesicle then fuses with a lysosome (step 1), which contains enzymes that break down the foreign cell (step 4). Finally, the wastes are removed (step 2). Therefore, the correct sequence is 3, 5, 1, 4, 2, which corresponds to choice C.

The Following Is a List of Steps Involved in the Process