Which of these processes is also known as 'cell eating'?

• A. Exocytosis
• B. Receptor-mediated endocytosis
• C. Pinocytosis
• D. Phagocytosis

Answer: (D)

Verified step by step guidance

1. Understand the context of the question: The question is asking about a process known as 'cell eating'. This is a type of endocytosis where cells engulf large particles or even other cells.
2. Identify the key term: 'Cell eating' is a common term used to describe phagocytosis, a process where cells, such as white blood cells, ingest or engulf other cells or particles.
3. Differentiate between the options: Exocytosis is the process of vesicles fusing with the plasma membrane and releasing their contents outside the cell, which is the opposite of endocytosis. Receptor-mediated endocytosis involves the intake of specific molecules based on receptor binding, and pinocytosis is known as 'cell drinking', where the cell ingests extracellular fluid and small particles.
4. Focus on phagocytosis: Phagocytosis is specifically the process where cells engulf large particles or other cells, often used by immune cells to remove pathogens or debris.
5. Conclude with the correct identification: Based on the descriptions, phagocytosis is the process that matches the description of 'cell eating'.