For many true experimental designs, pretest-posttest designs are the preferred method to compare participant groups and measure the degree of change occurring as a result of treatments or interventions.
Itâs important to note that the flush caused by niacin is not harmful or dangerous. It is actually a sign of improved blood flow and circulation. Also niacin oxygenates the blood. When you get a niacin âflushâ it is an indication that the niacin is causing small blood vessels in your body to expand in size.Many of your small blood vessels, called capillaries, are so small that blood cells can only go through them in single file or if they are flexible enough to fold over.t is actually a sign of improved blood flow and circulation. Also niacin oxygenates the blood. When you get a niacin âflushâ it is an indication that the niacin is causing small blood vessels in your body to expand in size.
Platelets are the smallest of the three major types of blood cells. 1  are only about 20% of the diameter of red blood cells. 2  The normal platelet count is 150,000-350,000 per microliter of blood, but since platelets are so small, they make up just a tiny fraction of the blood volume.isorders of Platelet Number: Too Few Platelets. Disorders with low platelet counts are called thrombocytopenias, a term derived from an old name for platelets, âthrombocytesâ. This name describes the platelets as the cells (âcytesâ is a word for cell) that contribute to thrombosis, or blood clotting.