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Cystic fibrosis transmembrane conductance regulator (CFTR) is a protein that functions as a channel through cell membranes, which moves chloride ions into and out of cells. The movement of chloride ions is important in maintaining water and salt balance and also aids in the production of mucus by regulating the movement of water into and out of tissues. Mutations of this protein can drastically change the structure and function of the chloride ion channels, which can lead to cystic fibrosis and digestive problems as well as congenital bilateral absence of the vas deferens (CBAVD). Cystic fibrosis is a disease that causes damage to many of the body’s organs due to an accumulation of very thick and viscous mucus. This unusually thick mucus can cause breathing problems as well as bacterial infections that can result in the development of scar tissue and cysts in the lungs. Many people with cystic fibrosis also suffer from digestive problems due to the blockage of the pancreatic ducts with mucus. The blockage of these ducts significantly decreases the amount of insulin that is produced b...

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