unit 6; hematology Flashcards
what is bloods main task.
gas exchange
what makes blood red
hemoglobin
what is the composition of blood (%)
55% plasma/serum and 45% formed elements
red blood cell production occurs where
bone marrow for adults.
why is the total number of rbc generally constant
negative feedback loop
what two things are needed for DNA synthesis
B12 and folic acid
what is the order of normal development for rbc
stem cell, proerythroblast, normoblast, reticulocyte, mature rbc
do protein amino acids make up globin (true or false)
true
what is heme decomposed into
iron or biliverdin
how does the body recycle iron
iron that is bound by transferrin is put into the blood, which is then transported to the liver, it is later stored in the “F + H” warehouse where ferritin and hemosiderin use it later.
what do platelets do
help the blood to clot
are antigens on surface of red blood cell
yes
are antibodies in the blood plasma
yes
a persons plasma wont contain any antibodies that will bin to molecules that are a part of his or her body (true or false)
true
Blood group A has what kin dof antigens and antibodies
A antigens
B antibodies
blood group B has what kind of antigens and what kind of antibodies
B antigens and A antibodies
blood group AB has what kind of antigens and what kind of antibodies
A and B antigens and NO A or B antibodies
blood group O has what kind of antigens and what kind of antibodies
No A or B antigens and Both A and B antibodies
who are the universal donors
TYPE O
who are the universal recievers
TYPE AB
what is hemostasis
stopping of bleeding
what are three steps of hemostasis
blood vessel spasm, platelet plug formation, blood coagulation
what is the difference between a clot, thrombus, and embolus
clot or thrombus is a “scab” essentially forming on the side of a vessel. If a clot forms abnormally in a vessel then it is a thrombus; however, if it dislodges then it is considered an embolus.
what is the difference between an extrensic pathway and an intrinsic pathway
extrinsic is initiated by factors outside the blood vessel, while intristic is initiated by factors inside the blood vessel.
what is the common pathway
prothrombin –> thrombin
what are the most abundant dissolved substances in the blood plasma?
albumins, globulins, fibrinogens.
what are the albumins responsible for
osmotic pressure of the blood and accounts for 60% of the plasma proteins.
what do the globins do
transports lipids and fat-soluble vitamins; about36% of plasma proteins
what is fibrinogen do
plays a role in blood coagulation; only 4%
what are the most important blood gases
o2 and co2
