The organelle that stores and releases chemicals in a cell is known as the Golgi apparatus.
The Golgi apparatus, often referred to as the Golgi body or Golgi complex, plays a crucial role in the processing and packaging of macromolecules like proteins and lipids. After proteins are synthesized in the rough endoplasmic reticulum, they are transported to the Golgi apparatus, where they undergo modification, sorting, and packaging into vesicles that can either be used within the cell or secreted outside the cell. This organelle essentially serves as a shipping and receiving center for the cell, ensuring that various chemicals and substances are appropriately distributed and delivered where needed.