What occurs during exocytosis?

During exocytosis, molecules are transported to the cell membrane and then released into the exterior environment. This process involves vesicles that contain the molecules fusing with the cell membrane, allowing their contents to be expelled outside the cell. Exocytosis is essential in various cellular functions, including the secretion of hormones, neurotransmitters, and other substances necessary for communication and metabolic processes.

The other options do not accurately describe exocytosis. For instance, synthesizing molecules inside the cell pertains to cellular processes like transcription and translation rather than exocytosis. Transporting molecules into the nucleus refers to nuclear import mechanisms, and absorption by surrounding cells relates to processes such as endocytosis or passive diffusion, not exocytosis. Therefore, the chosen answer correctly identifies the key function of exocytosis as the process of releasing molecules from the cell.