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).
An MRCP uses an MRI machine with special software to obtain images comparable to the cholangiogram and pancreatogram obtained by the more invasive approach with ERCP (endoscopic retrograde cholangiopancreatography) without the added risks of sedation, pancreatitis, and perforation.RCP may be useful, for example, in cases with unexplained abdominal pain in which there is a low or uncertain probability of hepatobiliary pathology such as retained stones in the common bile duct, cancer, biliary dyskinesia, or idiopathic pancreatitis. MRCP in another context can stand for something quite different.