Question

Fusion of a secretory vesicle with the plasma membrane and discharge of its contents is called ________?

1) Exocytosis
2) Endocytosis
3) Phagocytosis
4) Pinocytosis

Answer 1

Exocytosis is the process where a cell's secretory vesicles fuse with the plasma membrane to release contents outside of the cell. so, option 1 is the correct answer.

Step-by-step explanation:

The fusion of a secretory vesicle with the plasma membrane and the discharge of its contents is called exocytosis. This process is necessary for cells to release substances such as proteins, waste products, or toxins. During exocytosis, vesicles containing these substances merge with the plasma membrane, leading to the expulsion of the vesicular contents into the extracellular space. Unlike exocytosis, endocytosis involves the uptake of substances from the extracellular environment into the cell, with phagocytosis and pinocytosis being specific forms of endocytosis for larger particles and fluids, respectively.

Exocytosis is the fusion of a secretory vesicle with the plasma membrane and the discharge of its contents outside the cell. It is used by cells to export substances, remove waste products, and release chemical signals.

Exocytosis is the fusion of a secretory vesicle with the plasma membrane and the discharge of its contents to the outside of the cell. This process is used by cells to export substances, remove waste products, and release chemical signals. For example, cells may use exocytosis to release proteins, lipids, or toxins into the extracellular space.