breathing notes Flashcards
what happens during inhalation
diaphragm contracts and moves down and the intercostal muscles contract pulling on the ribs to expand the ribcage.
volume of the thoracic cavity larger which decreases the gas pressure in the lungs
air pressure is now greater outside the body than inside the lungs and air rushes in
what happens during exhalation
diaphragm relaxes and moves up and the intercostal muscles relax causing the ribcage to close
the volume decreases inside the thoracic cavity and increases the gas pressure in the lungs
air pressure is now greater inside the body and air rushes out
equation for cellular respiration
C6H1206 + O2 »_space; 6CO2 + 6H20 + ATP
why does carbon dioxide have to be eliminated from cells and blood?
it reacts with water to form and acid (carbonic acid)
tissues are quickly using oxygen during cellular respiration to produce ATPP
tissues are low in oxygen, but high in carbon dioxide waste
blood coming from the heart and body cells prior to gas exchange is…
high in CO2 gas and low in O2 gas
blood leaving to return to the heart and body cells after gas exchange is…
high in O2 gas and low in CO2 gas
inhaled air from outside that inflates the alveoli is…
high in O2 concentration
low in CO2 concentration
movement of gases between the alveoli and blood capillaries occurs from high to low concentration by a process know as…
diffusion
wht protein inside of red blood cells binds to oxyegn to allow cells to transport it?
hemoglobin
where s carbon dioxide mostly transported?
in the plasma
where will carbon dioxide go after entering the alveolus
bronchioles, bronchi, trachea, exhales
prior to gas exchange tissues are…
high in CO2 gas
low in O2 gas
prior to gas exchange blood flowing adjacent to tissues is…
high in O2 gas
low in CO2 gas
pulmonary circulation
as blood flows past tissues it drops off O2 and picks up CO2
then flows to the right side of the heart then to the lungs for gas exchange
after the blood has picked up O2 and dropped CO2 off in the lungs it flows to the left side of the heart which pumps to the tissues
