Chapter 17 Flashcards
Hematocrit
percent of blood volume in RBCs
Males normal hematocrit
47% +/- 5%
Females normal hematocrit
42% +/- 5%
Albumin
makes up 60% of plasma proteins
Functions of albumin
carrier of other molecules, as blood buffer, and contribute to plasma osmotic pressure
Functions of Erythrocytes
each Hb molecule can transport four O2
Hematopoiesis
formation of all blood cells
Where does hematopoiesis
red bone marrow
Myeloid stem cells
transforms into proerythroblast
Orthochromatic erythroblasts
eject most organells, nucleus degrades, causing concave shape
Reticulocytes
still contain small amount of ribosomes
Erythropoietin
hormone that stimulates formation of RBCs
Dietary requirements for erythropoiesis
iron, B12, folate
Neutrophils
bacterial slayers
Eosinophils
worms, wheezes, and weird disease
Basophils
histamine and similar functionality of mast cells
Lymphocytes
mostly found in lymphoid tissue
Monocytes
leave circulation, enter tissue, and differentiate into macrophages
Macrophages
actively phagocytic cells
Platelet
fragments of larger megakaryoctye
Three steps in hemostatis
vascular spasm, platelet plug formation, coagulation (blood clotting)