What Is Cystic Fibrosis?
Cystic fibrosis is an inherited chronic disease that affects the lungs and digestive system of about 30,000 children and adults in the United States (70,000 worldwide). A defective gene and its protein product cause the body to produce unusually thick, sticky mucus that:
In the 1950s, few children with cystic fibrosis lived to attend elementary school. Today, advances in research and medical treatments have further enhanced and extended life for children and adults with CF. Many people with the disease can now expect to live into their 30s, 40s and beyond.
Symptoms of Cystic Fibrosis
People with CF can have a variety of symptoms, including:
Statistics
Facilitated diffusion does not require energy for the transportation of molecules across the cell membrane.
Passive transportation of substances across the cell membrane is called passive diffusion. It does not require energy input from the cell and relies on the concentration gradient to move molecules from high concentration to low concentration.
Active transport is a process in which cells use energy to move substances against their concentration gradient, from an area of low concentration to an area of high concentration, across the cell membrane. This is achieved by using specialized proteins called pumps that actively transport the substances across the membrane, requiring energy in the form of ATP.
Symport is the type of transport that involves the coupled passage of two materials across a membrane in the same direction. It relies on a concentration gradient to move both substances across the membrane simultaneously.
Channel proteins are a type of protein found in the cell membrane that regulate the passage of specific ions or molecules into or out of the cell. These proteins form channels or pores that allow substances to pass through the membrane, controlling the movement of substances across the cell membrane.
Facilitated diffusion does not require energy for the transportation of molecules across the cell membrane.
transportation
Integral proteins allow movement of non-polar substances across membranes.
The membrane allows it and cytoplasm also helps it.
transportation
Carrier proteins help facilitate the movement of certain substances across the cell membrane by binding to specific molecules and carrying them across. These proteins undergo conformational changes to transport the substances across the membrane.
Passive transportation of substances across the cell membrane is called passive diffusion. It does not require energy input from the cell and relies on the concentration gradient to move molecules from high concentration to low concentration.
The diffusion of substances across a membrane is driven by the concentration gradient, which is the difference in concentration of a substance on either side of the membrane. Substances naturally move from areas of high concentration to areas of low concentration in order to reach equilibrium.
carrier protein
Diffusion
Active transportation is the material that across plasma membrane. This makes it flow one way.
An Integral Membrane Protein Assists A Specific Substances Across The Membrane.