Question

question 15
white blood cells (macrophages) engulf bacteria through what process?
o pinocytosis
o phagocytosis
o exocytosis
o receptor - mediated exocytosis

Explanation:

• Pinocytosis: It is a form of endocytosis where cells take in extracellular fluid and dissolved solutes. It is not specifically for engulfing bacteria.
• Phagocytosis: This is the process by which certain cells (like macrophages) engulf and digest large particles such as bacteria. Macrophages are phagocytic white blood cells that play a crucial role in the immune system by removing pathogens.
• Exocytosis: This is the process of vesicles fusing with the plasma membrane and releasing their contents outside the cell. It is the opposite of endocytosis (which includes phagocytosis and pinocytosis) and is not involved in engulfing bacteria.
• Receptor - mediated exocytosis: This is a specific type of exocytosis that is regulated by receptors. It is not related to the engulfing of bacteria.

Answer:

phagocytosis