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.
The membrane enclosing the vesicle is also a lamellar phase, similar to that of the plasma membrane, and vesicles can fuse with the plasma membrane to release their contents outside of the cell.Vesicles can also fuse with other organelles within the cell.Vesicles perform a variety of functions.Because it is separated from the cytosol, the inside of the vesicle can be made to be different from the cytosolic environment.For this reason, vesicles are a basic tool used by the cell for organizing cellular substances. Vesicles are involved in metabolism, transport, buoyancy control, and enzyme storage.ecause it is separated from the cytosol, the inside of the vesicle can be made to be different from the cytosolic environment. For this reason, vesicles are a basic tool used by the cell for organizing cellular substances. Vesicles are involved in metabolism, transport, buoyancy control, and enzyme storage.