Surprise! This is America's Favorite Pizza Brand Once Again 3 billion pizzas are purchased in the U.S. every year, but customers of this pizza chain are unquestionably the most loyal. Sean Williams
Gap junctions are a specialized intercellular connection between a multitude of animal cell-types. They directly connect the cytoplasm of two cells, which allows various molecules, ions and electrical impulses to directly pass through a regulated gate between cells. One gap junction channel is composed of two connexons (or hemichannels), which connect across the intercellular space. Gap junctions are analogous to the plasmodesmata that join plant cells. Gap junctions occur in virtually all tissues of the body, with the exception of adult fully developed skeletal muscle and mobile cell types such as sperm or erythrocytes.
Selective permeability: Doesnât allow everything to pass through equally, has to have permission by the cell membrane e. Water is a molecule that can easily be passed through cell membrane without the help of carriers 13.Define/compare passive diffusion/active transport and simple/facilitated diffusion a. Active transport: moves molecules from lower concentration to higher with the help of ATP. Requires energy b.