Platelets or cialis super active platelets - cells are not flat-correct rounded shape with a diameter of 2-5 mm. Human platelets have no nuclei. The number of platelets in human blood is 180-320h109 / l or 1 180.000-320.000 ml. There are daily fluctuations: platelet day more than at night. The increase in platelet content of peripheral blood is called thrombocytosis, reduction - thrombocytopenia.
The main function of platelets is to buy xenical cheap participate in hemostasis. Platelets are able to adhere to the foreign surface (adhesion), and stick together (aggregation) caused by various causes. Platelets produce and secrete a number of bioactive substances serotoiin, adrenaline, noradrenaline, and substance, called plate-clotting factors. Platelets can be isolated from the cell membrane arachidonic acid and convert it into thromboxane, which, in turn, increase the activity of platelet aggregation. These reactions take place under the action of the enzyme cyclooxygenase. Platelets can kperedvizheniyu by pseudopodia formation and phagocytosis of foreign bodies, virus, immune complexes, Priligy buy thereby performing a protective function. Platelets contain a large amount of histamine and serotonin, which affect the size of the gap and capillary permeability, thereby determining the state gistogematicheskih barriers.