An endoscopic exam may be done to the upper or the lower gastrointestinal (GI) tract. An endoscopy of the upper gastrointestinal (GI) tract allows the physician to see the esophagus (the tube which attaches the mouth to the stomach), the stomach, and the duodenum (first part of the small bowel or intestine). This exam may be done to: Locate bleeding in the upper gastrointestinal tract.
What would happen if a cell's lysosomes burst? Quick Answer. If a cell's lysosomes burst, the enzymes released would severely damage various components of the cell, potentially killing it. Lysosomes are small, membrane-bound vesicles, or containers, which the cell fills with powerful digestive enzymes for use when needed to digest food items.
However, magnetic resonance imaging has shown that when a person is undergoing an MS attack, the bloodâbrain barrier has broken down in a section of the brain or spinal cord, allowing white blood cells called T lymphocytes to cross over and attack the myelin.t is believed that latent HIV can cross the bloodâbrain barrier inside circulating monocytes in the bloodstream ( Trojan horse theory) within the first 14 days of infection. Once inside, these monocytes become activated and are transformed into macrophages.