1.10 RBC Metabolism Flashcards
Total blood volume
5-6 liters
Whole blood minus the formed elements
Plasma
Whole blood minus formed elements and clotting factors
Serum
Normal RBC count for ment
5-6 million/mm3
Normal RBC count for women
4-5 million/mm3
Normal life span of RBCs
90-120 days
Controls RBC production
Erythropoietin by the kidneys
Ankyrin binds to integral protein ___
Band 3
Actin binds to peripheral protein ___
Band 4.1
integral protein important for anion exchange
Band 3
Proteins that help shape and allow flexibility of the RBC
Peripheral proteins
Gives the cell membrane its strength and flexibility
Spectrin
RBC membrane transporter that is insulin dependent
GLUT-1
The A antigen in blood type A has an extra ___
GalNAc
The B antingen in blood type B has an extra __
Gal
RBC metabolism of glucose via anaerobic glycolysis
Embden-Meyerhoff Pathway
RBC metabolism of glucose via Pentose Phosphate Pathway; aerobic
Hexose Monophosphate Shunt
Enzyme responsible for the conversion of phosphoenolpyruvate to pyruvate is ___
Pyruvate kinase
Enzyme responsible for the conversion of Pyruvate to lactate is ___
L-lactate dehydrogenase
Enzyme responsible in converting G6P to 6-phosphogluconate then to ribulose 5-phosphate
G6P dehydrogenase
Enzyme responsible for converting 1,3 diphosphoglycerate to 2-3 diphosphoglycerate
diphosphoglycerate mutase
Enzyme responsible for converting 2,3-DPG to 3 phosphoglycerate
2,3 BPG phosphatase
RBC disorder due to abnormalities in spectrin
Hereditary elliptocytosis
A genetic defect caused partial or total absence by one or more alpha or beta chains of hemoglobin
Thalassemia
Heme is the prosthetic group of ___ in the liver
Cytochrome p450
rate controlling enzyme in heme biosynthesis
Ala synthase
Steps and enzymes in heme biosynthesis
Enzymes:ALA synthaseALA dehydrataseHMB synthaseUroporphyrinogen III synthaseUroporphyrinogen decarboxylaseCoproporphyrinogen oxidaseProtoporphyrinogen oxidaseFerrochelatase
Group of disorders caused by abnormalities in the pathway of biosynthesis of heme
Porphyria
Also known as bone marrow failure where the body doesnt make enough RBCs, WBCs, and platelets
Aplastic anemia
Hemoglobinopathy with increased concentration of erythrocytes
Polycythemia vera
Hemoglobinopathy characterized by large cells with increased nuclear/cytoplasmic ratio
Megaloblastic enmia
Hemoglobinopathy characterized by small and pale red blood cells due to iron deficiency
Vitamin B6 or iron-deficiency anemia