Question 18

Lysosomes contribute to phagocytosis in white blood cells.

Lysosomes play a crucial role in phagocytosis by breaking down waste materials and cellular debris that white blood cells engulf. They contain digestive enzymes that facilitate the degradation of these materials, enabling the immune system to function effectively.

A) Endoplasmic Reticulum (ER)

The Endoplasmic Reticulum (ER) is primarily involved in the synthesis of proteins and lipids, not in the process of phagocytosis. While it plays a vital role in cellular functions, it does not directly contribute to the engulfing and digestion of pathogens by white blood cells.

B) Lysosomes

Lysosomes are essential for phagocytosis as they contain enzymes that digest and break down pathogens and debris that are engulfed by white blood cells. This makes lysosomes the correct answer, as they directly facilitate the degradation process necessary for effective immune response.

C) Vacuole

Vacuoles serve various functions, such as storage and transport within cells, but they are not primarily involved in phagocytosis. While they may assist in the storage of materials, they do not contain the necessary enzymes for digestion like lysosomes do.

D) Golgi apparatus

The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for secretion or delivery to various parts of the cell. It does not play a direct role in phagocytosis, making it irrelevant to the process of engulfing and digesting pathogens in white blood cells.

Conclusion

Lysosomes are definitively the organelles responsible for facilitating phagocytosis in white blood cells due to their role in digesting engulfed materials. In contrast, the Endoplasmic Reticulum, vacuoles, and Golgi apparatus do not contribute to this specific immune function, highlighting the unique importance of lysosomes in the immune response.