Vesicles transport materials within a cell. Vesicles are constantly forming, membrane-wrapped containers that transport things like protein through a cell.Know More
Vesicles that are artificially prepared are called liposomes. Naturally prepared vesicles are those made during exocytosis, endocytosis and phagocytosis. The membrane that encloses a vesicle is similar to the plasma membrane, and plasma membranes and vesicles can fuse together, making it possible to release the contents of the vesicle outside the cell.
Vesicles have various job functions. They aid in metabolism and enzyme storage and help control the balance inside and outside a cell. When vesicles malfunction, sometimes serious or fatal conditions may occur like diabetes and epilepsy.Learn more about Cells
In an embryo, one cell becomes a brain cell and another a skin cell through the process called cell differentiation, which involves changes in gene expression. The genome stays the same in each specialized cell, while each cell has a different structure and functions.Full Answer >
A sperm cell delivers its DNA to and fertilizes eggs, according to the National Center for Biotechnology Information. The BBC points out that this genetic material is contained in 23 chromosomes, which combine with the 23 chromosomes found in the female sex cell to make 23 pairs of chromosomes that contain all the genes for the new embryo.Full Answer >
Cell membranes contain and protect the contents of the cell. They are active in signaling other cells, and proteins embedded in their matrix regulate the cell's chemistry by selectively absorbing and secreting chemicals. Many single-celled organisms, such as amoebae, use their flexible membranes for locomotion and food gathering.Full Answer >
As of 2005, the smallest known cell to man is the SAR11 micro-organism, according to Red Orbit. The SAR11 cell measures a mere 1 micron in length.Full Answer >