Theme 22: Respiration 4 Flashcards
What is oxygen transported with?
hemoglobin
What is carbon dioxide transported as and where?
as a bicarbonate ion in the plasma
What direction do CO2 and O2 go in the capillaries?
CO2 = out O2 = in
What does exchange of gases down a partial pressure gradient do?
cause oxygen partial pressure to go up and carbon dioxide partial pressure to go down
Do you need a smaller pressure gradient to move the O2 in or out?
in
does a pulmonary artery carry mixed venous blood or arterial blood?
mixed venous blood
where is arterial blood carried?
pulmonary vein
why is hemoglobin needed to transport oxygen in the blood?
oxygen is very insoluble in plasma water so you can barely transport any
What is hemoglobin?
a carrier protein that can transport lots of oxygen at an arterial partial pressure
What does carbon monoxide cause?
anemia
where is hemoglobin stored?
behind red blood cell membranes
What does hemoglobin have to bind to oxygen?
iron core
What are the 4 sub units in hemoglobin?
2 alpha
2 beta
What is carrying capacity for hemoglobin?
whether it is completely saturated or not
What do the sub-units of hemoglobin do as oxygen is added?
the break down into the 4 (for four oxygen molecules)
