casta paintings are not an intrinsic expression of spanish colonialism of the eighteenth century and mexico was but a small part of the spanish empire at the beginning of the century yet both authors treat the casta paintings as an element of a universal spanish colonial culture
Exocytosis. Photo by: Alila. Exocytosis is the cellular process in which intracellular vesicles in the cytoplasm fuse with the plasma membrane and release or secrete their contents into the extracellular space.Exocytosis can be constitutive (occurring all the time) or regulated.hoto by: Alila. Exocytosis is the cellular process in which intracellular vesicles in the cytoplasm fuse with the plasma membrane and release or secrete their contents into the extracellular space.
Exocytosis involves the release of material from a cell. This happens when secretory cells release their products, for example in the salivary glands and pancreas. Substances within the cell are enclosed by a membrane to form what is called a vesicle.his is known as the regulatory secretory pathway. In the constitutive pathway, vesicles fuse with the plasma membrane on arrival, but secretory vesicles of the regulatory pathway only do so when the cell receives a signal.