Week 7 Flashcards
spirometry
test that measures air volume
respiratory cycle
one inspiration plus the following expiration
resting tidal volume
apporoximately the same volume leaves during a normal resting expiration
medullarly respiratory center
extends through oblongata
ventral respiratory group and dorsal respiratory group
chemosensitive areas
in the ventral part of the medulla near the originsof the vagus
senses changes of the CSF
if it rises respiratory rate and tidal volume increase
hyperventiliation
too much Co2 in blood
lowers carbom dioxide level
alveoli
exchange gasses beteen air and blood
respiratory membrabe
simple sqamous epithelium
alveoli can stretch
to 620 miles
% of air
78% nitrogen
21% oxygen
.04% carbon dioxide
peripheral
cell + Capillary
O2 in blood
increases pressure of blood
oxyhemoglobin
where Po2 is high oxygen dissolves in blood and combine rapidly with the iron atoms of hemoglobin forming oxyhemoglobin
hypoxia
deficency of o2 reaching tissues
hemoglobin
98% of oxygen in blood binds to become hemoglobin
the rest is dissolved in plasma