Cell eating.

Cell eating.

• A. Pinocytosis
• B. Endocytosis
• C. Phagocytosis
• D. Exocytosis

Answer: (C)

Phagocytosis is the process of cell eating: a cell engulfs large particles such as bacteria or debris by extending its membrane around the target and wrapping it into a vesicle called a phagosome. This is a form of endocytosis used by immune cells like macrophages and neutrophils to remove invaders and dead material. The phagosome then fuses with a lysosome, forming a phagolysosome where digestive enzymes break down the contents. The remaining material can be expelled or recycled. Endocytosis is the general term for taking in material via vesicles, and phagocytosis is the specific mode for large particles. Pinocytosis, or cell drinking, involves tiny droplets of extracellular fluid and dissolved solutes, not whole particles. Exocytosis is the process of releasing contents from the cell by vesicle fusion with the membrane.

Phagocytosis is the process of cell eating: a cell engulfs large particles such as bacteria or debris by extending its membrane around the target and wrapping it into a vesicle called a phagosome. This is a form of endocytosis used by immune cells like macrophages and neutrophils to remove invaders and dead material. The phagosome then fuses with a lysosome, forming a phagolysosome where digestive enzymes break down the contents. The remaining material can be expelled or recycled.

Endocytosis is the general term for taking in material via vesicles, and phagocytosis is the specific mode for large particles. Pinocytosis, or cell drinking, involves tiny droplets of extracellular fluid and dissolved solutes, not whole particles. Exocytosis is the process of releasing contents from the cell by vesicle fusion with the membrane.