Quoted from the NIH: Normally, the immune system helps protect the body, but with Crohn's disease the immune system can't tell the difference between normal body tissue and foreign substances. The result is an overactive immune response that leads to chronic inflammation. This is called an autoimmune disorder..
Platelet Aggregation Test. A platelet aggregation test checks how well your platelets clump together. Platelets are types of blood cells. They help form blood clots by sticking together. A clot stops the bleeding when you have a wound. A platelet aggregation test requires a blood sample.The sample will be examined to see how the platelets are distributed through the plasma. Plasma is the liquid part of the blood. The lab technician will also add certain chemicals to your blood sample to test how quickly your platelets form a clot.latelets are types of blood cells. They help form blood clots by sticking together. A clot stops the bleeding when you have a wound. A platelet aggregation test requires a blood sample. The sample will be examined to see how the platelets are distributed through the plasma.
The plug is prevented from spreading away from the site of injury by the production of prostacyclin I 2 (PGI 2), which is a potent inhibitor of platelet aggregation and release, in the normal endothelium in adjacent areas.ormation of platelets involves âpinching offâ bits of cytoplasm from the megakaryocyte, with each megakaryocyte giving rise to about 1000 platelets. The normal platelet count in blood is about 300 Ã 10 9 /litre. The structure of platelets is complex.