VNSG 1509 - Exam 4 Study Guide.

VNSG 1509 - Exam 4 Study Guide Chapter 46 Describe the components of blood. o RBCs (erythrocytes), WBCs (leukocytes), Platelets (thrombocytes) o Plasma is the light-yellow fluid of the blood it is 55% of blood volume. o 45% of blood is composed of blood cells and platelets. Erythropoiesis is the process of RBC production Depends on several factors of Healthy bone marrow, presence of dietary substances (iron, copper, essential amino acids, vitamin B12, folic acid, riboflavin (vitamin B2) pyridoxine (vitamin B6)) When amount of O2 being delivered to tissue decreases, kidneys get triggered, releases renal erythropoietic factor (erythropoietin) Erythropoietin is carried to bone marrow; initiates development of mature RBCs The increased number of RBC allows more O2 to be delivered, which shuts off the signal to increase RBC production