breathing Flashcards
1
Q
what is breathing?
A
rib cage and diaphragm
2
Q
what is inhalation?
A
ribs upward & outward and diaphragm pushes down
3
Q
what is exhalation?
A
ribs inward & downward and diaphragm pushes up
4
Q
what is the medulla?
A
breathing center
5
Q
what is the medulla sensitive to?
A
[co2]
6
Q
what happens if there is high [co2] for the medulla?
A
nerve impulses from the medulla act on the rib muscles and the diaphragm
7
Q
what does high breathing rate cause?
A
low [co2] (feed back mechanism)
8
Q
what is the feedback mechanism?
A
homeostasis
