Z 343 lab Flashcards
3 functions of blood
transportation of gases, nutrients, vitamins regulation of pH, temp, etc. protection
2 components of blood
plasma (water, proteins, solutes) formed elements (erythrocytes and buffy coat (leukocytes, platelets))
erythrocytes
RBCs most common formed element anucleate and missing most other organelles disc shaped, 7-8 microns contains hemoglobin
hemoglobin
carries O2, 23% of CO2, also regulates blood flow and pressure
determining levels of hemoglobin useful in….
classifying cause of anemia (lack of RBCs v. lack of hemoglobin in RBCs) rupture RBCs and measure intensity of color to determine hemoglobin content of sample
anemia
reduction in O2 carrying capacity in blood
aplastic anemia
caused by failure of red bone marrow to produce RBCs
iron deficiency anemia
decrease in hemoglobin production due to inadequate iron
sickle cell anemia
inherited condition hemoglobin misshaped resulting in reduce O2 carrying capacity
polycythemia
higher than normal volume of red blood cells
hematocrit
rough measure of O2 carrying ability of blood centrifuge blood and measure volume occupied by RBCs
PCV/HB
measures amount of hemoglobin per unit of RBC
agglutinins
antibodies in blood plasma that react with antigens not found on RBCs of individual
universal donor
O+
universal recipient
AB+
Rh
antigen first discovered by rhesus monkeys most people Rh+
in Rh- individuals…
anti-Rh antibodies are not innately found produced by immune system after exposure to Rh+ blood subsequent exposure to Rh+ blood can cause severe reactions
platelets
anucleate cell fragments small 2-4 microns. aids in stopping blood loss by forming platelet plug, releasing chemicals that promote blood clotting, releasing chemicals that promote vascular spasm
platelets formed by
splintering of megakaryocytes in red bone marrow