BIOL 3060 Lecture Notes - Lecture 10: Buffy Coat, Vasoactivity, Megakaryocyte
Document Summary
Oct25: hemoglobin has 4 proteins = globin genes. Highly cooperative = every time an o2 binds to one of the subunits, it changes the affinity of the other subunits, cooperativity. In hematocrit, white blood cells and platelets form the buffy coat. Wbcs are in the blood and lymph system for surveillance. Lymph system brings fluid back into the circulatory system: all wbcs are nucleated cells, most are produced in bone marrow except lymphocytes (from. Lymphocytes are in the lymphatic system lymph nodes: platelets are produced by megakaryocytes in the bone marrow, they fragment off and the fragments go to the blood. They are smaller than rbcs, they function in clotting. They detect broken tissue and initiate clotting cascade (an amplification system that works with platelets to seal the holes). In birds, fish, reptiles and amphibians they are called thrombocytes they are nucleated small cells. Lymphocytes have vasoactive substances, when they are activated, they can release substances that (cid:272)ause (cid:448)aso(cid:272)o(cid:374)stri(cid:272)tio(cid:374).
