A white blood cell (WBC)encounters bacteria in a scrape on the knee of a child who has fallen off of his bicycle.The WBC's job is to take the bacteria inside of itself and destroy the bacteria.If the bacteria cannot be moved across the WBC membrane,how will the WBC most likely take it in?

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Phagocytosis is the process by which a cell engulfs and destroys a foreign particle or bacterium. This is the most likely method by which a white blood cell would take in and destroy bacteria. Exocytosis is the opposite process, where a cell releases contents outside the cell. Pinocytosis is a process by which a cell takes in small amounts of fluid and dissolved molecules. Facilitated diffusion is a form of passive transport where molecules move across a membrane with the aid of a transport protein. None of these processes are as well-suited to taking in and destroying bacteria as phagocytosis.

A White Blood Cell (WBC)encounters Bacteria in a Scrape on the Knee