My Documents

1. What is the significance of a lower-than normal hematocrits? What is the effect of a bacterial infection on the hematocrit? A drop in the hematocrit indicates anemia, a lower than normal number of RBCs. An effect of bacterial infections on hematocrit is low because the white blood cells fight infection. 2. Compare the development of lymphocytes with the development of the other formed elements. Lymphocytes have a lifetime measured in years most formed elements of the blood are continually dying and being replaced within hours, days, and weeks. 3. What is erythropoiesis? What factors speed up and slow down erythropoiesis? The specific production of RBCs that starts in the red bone marrow with a precursor cell called a proerythroblast. The lack of oxygen or blood flow can slow erythropoiesis. 4. Explain what would happen if a person with type B blood were given a transfusion of type O blood. Nothing it is compatible.
6. Why would the level of leukocytes be higher in an individual has been infected with a pathogen? More white blood cells are being made to fight off the pathogen.
7. In regions where malaria is endemic, some people build up immune resistance to the malaria pathogen. Which WBCs are responsible for the immune response against pathogens? How do they functions? White blood cells or leukocytes are vital cells of the immune system protecting the human body against infections, bacteria, microbes, viruses and pathogens. These cells are produced in the stem of the bone marrow and are composed of granulocytes (neutrophils, eosinophils, and basophils) and non-granulocytes (lymphocytes and monocytes). White blood cells act as the defending army of the human immune system providing a shield against several diseases and viruses. An inherently weak or defective immune system can lead to increased susceptibility to infection, allergies, autoimmune diseases.
8. What is the function of prothrombinase and thrombin in clotting? Explain how the