In the context of movement of cells, exocytosis is the process by which:

Key Points

• Exocytosis is a process used by cells to move materials from within the cell into the extracellular fluid.
• This process involves vesicles containing waste materials or other substances fusing with the cell membrane and releasing their contents outside the cell.
• Exocytosis is essential for various cellular functions, including neurotransmitter release, hormone secretion, and the removal of cellular waste.
• It is a form of active transport, requiring energy in the form of ATP to proceed.

Additional Information

• Endocytosis is the reverse process of exocytosis, where cells absorb external material by engulfing it with the cell membrane.
• There are different types of endocytosis, including phagocytosis (ingestion of large particles) and pinocytosis (ingestion of fluids and dissolved small molecules).
• Apoptosis refers to programmed cell death, a regulated sequence of events that leads to the elimination of cells without releasing harmful substances into the surrounding area.
• Both exocytosis and endocytosis are critical for maintaining cellular homeostasis and communication.