Blood 2 Flashcards
what are the 3 formed elements
erthrocytes, luekocytes, and platelets
what are the only true cells
WBC’s
where are RBC’s made
red bone marrow
how long do blood cells last? do they divide?
a few day. no they are renewed in bone marrow
describe RBC’S characteristics
biconcave discs, anucleate, no organelles
what is the major factor erythrocytes contribute to?
blood viscosity
why are erythrocyets sometimes called a bag
they just hold hemoglobin which helps with gas transport
what does spectrin help RBC’s do
flex and bend, and change shape if necessary
how does the structural characteristic of erythrocytes help with gas transport
Large surface area relative to volume
97% of hemoglobin
generate ATP anaerobically and does not consume oxygen that is transported
Why isn’t Hb free in circulation
- increases osmotic pressure and pull water from the tissues and into the blood
- Kidneys are very sensitive and would damage it
- would lose hemoglobin to tissues where it would not longer do its job
RBC’s are desciated to
fighting infection
clotting blood
gas transport
trapping leukocytes
gas transport
can Hb be reversibly bound to oxygen
yes
what is the composition of Hb
two alpha chains, to beta chains, 4 heme groups with an iron for oxygen binding
What happens if one oxygen is bound
it encourages rapid uptake
what is oxyhemglobin? where does it take place?
Hb bound to oxygen, the lungs
