All of these must pass through the cell membrane. Transport may occur by diffusion and osmosis across the membrane. It can also occur when a vescicle attaches to the cell membrane from the inside and then opens to form a pocket, expelling its contents to the outside. This may be called exocytosis.
What is an MRCP? </>An MRCP test is a specialized MRI exam that evaluates the hepatiobiliary and pancreatic systems, including the liver, gallbladder, bile ducts, pancreas and pancreatic duct. An MRCP test can also be ordered to find the cause of pancreatitis or diagnose unexplained abdominal pain. Additionally, MRCP is a less invasive alternative to ERCP, a procedure that uses an endoscope combined with an IV injection of x-ray contrast dye and fluoroscopy (x-ray images).
Physicians use MRCP to: 1  examine diseases of the liver, gallbladder, bile ducts, pancreas and pancreatic duct. 2  These may include tumors, stones, inflammation or infection.3  evaluate patients with pancreatitis to detect the underlying cause.agnetic resonance imaging (MRI) is a noninvasive medical test that physicians use to diagnose and treat medical conditions. MRI uses a powerful magnetic field, radio frequency pulses and a computer to produce detailed pictures of organs, soft tissues, bone and virtually all other internal body structures.