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40 Cards in this Set

  • Front
  • Back
What is the third and least plasma protein
what percentage is fibrinogen
What is fibrinogen important for
blood clotting
in certain situations what happens to fibrinogen
it is converted to fibrin in the presence of thrombin
What does the removal of clotting proteins leave behind
Where do plasma proteins originate from
the liver
what does the liver do that produces the plasma proteins
it synthesizes and releases more than 90% of the plasma proteins
What is the purpose of plasma expanders
they are used to increase blood volume temporarily
What are erythrocytes
red blood cells
what is the percentage of red blood cells in the plasma
they make up 99.9% of the formed elements
what makes RBC's red
the hemoglobin
what is the job of the RBC's
they transport oxygen and carbon dioxide
What is a hemotracrit do
indicates the percentage of whole blood occupied my formed elements
what happens to hematocrit during dehydration
it increases
when does hematocrit decrease
during internal bleeding
What happens when u centrifuge a blood sample
all of the formed elements come out of suspension
What is the buffy coat that is formed above the thick layer of RBC's
the white blood cells and platlets
What is the structure of RBC's when matured
it has no nucleus, no organelles,
What are the facts bout a matured RBC
life span less than 120 days
energy demands are low
What are 3 important functions of the unusual shape of the RBC
1.) large s.a->v ratio
2.) can stack like dinner plates to flow through narrow blood vessels
3.) can bend and flex
What is the job of a hemoglobin
to transport oxygen and carbon dioxide
What forms a hemoglobin?
two ALPHA and two BETA chains
What is a heme
a pigment complex that is located in each Hb chain
how many HEME are located in each chain
What is located in HEME and what does it do?
it holds an iron ion

it interacts with oxygen molecule
what does the interaction between an iron ion and oxygen molecule form
oxyhemoglobin HBO2
what do RBC's look like when they contain HBO2
bright red
what is a hemoglobin molecule called when the ion is not bound to the oxygen
WHat is the color of deoxyhemoglobin
dark red

and what functions does this provide
the RBC's of an embryo or fetus

binds to O2 easier
how many Hb molecules does each RBC contain
about 280 million Hb molecules
how many heme units does an Hb molecule contain
How is carbaminohemoglobin formed
When 2 alpha and 2beta chains bind to carbon dioxide
what happens to Hb in Anemia
there is a low hematocrit because the O2 carrying capacity of blood is reduced
What happens in Thalassemia
there is an inability to produce adequate amounts of alpha and beta chains od hemoglobin
What happens in Sickle-cell anemia
the RBC's become more rigid and sharply curved because of the lower O2 concentration
how are a & b chains conserved/recycled
the are excreted in the urine
how are heme conserved/recycled
they are converted into bilirubin and biliverdin
how is iron gotten rid of
transferred to liver/spleen where it is changed into ferritin and hemosiderin and is reused
how is globular proteins gotten rid of
they are broken down into amino acids