Flashcards in Blood Deck (91)
what is the main protein found in plasma?
how many molecules of oxygen can be transported by one hemoglobin molecule?
What is plasma?
Nonliving fluid matrix
What are formed elements? Composition?
Living blood cells: erythrocytes, leukocytes, and platelets
Percent of total blood volume occupied by erythrocytes
Give the range of hematocrit for males and females
Males 47 +/- 5
Females 42+/- 5
What are the physical characteristics of blood
scarlet to dark red, pH 7.35-7.45, 38C
What does it mean when the blood is dark red or scarlet?
Dark red is a lack of oxygen and scarlet is the presence of oxygen
What are the 3 functions of blood?
protection, distribution.n and regulation
Name the term. helps maintain normal body temperature, pH, and fluid volume
Regulation of blood
What describes the slow blood loss preventing infection?
Protection of the blood
Describe blood plasma
straw-colored, sticky fluid, 90% water, 10% dissolved solutes
What describes the O2 and nutrients; metabolic and hormones?
Distribution of the blood
Which 3 proteins compromise plasma? Percentage?
albumin (60%), globulins(34%), and fibrinogen (4%)
T/F. Only leukocytes are complete cells
T/F Most formed elements divide, but are continuously renewed by division of stem cells in red bone marrow
F. Most do NOT divide
What are the functions of erythrocytes?
Pick up O2 and release it to tissue cells and transport ~ 20% of CO2 from tissue back to lungs
What is the shape of erythrocytes?
biconcave disc shape
What is the advantage of the particular shape of an erythrocyte?
increases surface area to volume ration allowing faster O2 exchange. This allows RBCs to bend and flex
What are the two parts of hemoglobin?
Globin and heme
Why is carbon monoxide dangerous?
CO has a higher affinity than O2 for heme binding sites
What is the term given to blood cell formation?
Where does blood cell formation occur in adults?
red bone marrow
What is another term for hemocytoblasts?
hematopoietic stem cells
What are the three phases of erythropoiesis?
1. Ribosome synthesis
2. Hemoglobin accumulation
3. Ejection of nucleus and formation of reticulocytes
What is Erythropoietin (EPO)?
A hormone that stimulates RBS production
How is EPO released?
In response to hypoxia via the kidneys
decreased RBC count, amount of Hb, and O2 availability
What is blood doping?.
RBCs are drawn off and stored then replaced