Gas exchange Flashcards
1
Q
What is the difference between inhalation and exhalation?
A
Inhalation is when oxygen diffuses across the lungs and exhalation is when the diaphragm relaxes and decreases the volume of the lungs.
2
Q
What structure makes the windpipe stay open?
A
The cartilage
3
Q
What body movements force air from the lungs?
A
Diaphragm relaxes and moves, intercostal muscles relax and move in.
4
Q
How does the diaphragm help you breath in.
A
It flattens and contracts
Volume decreases
pressure increases.
5
Q
Describe and explain what happens when the rubber sheet is pulled down
A
Balloon would inflate
Pulling rubber sheet down increases volume of jar.
Air rushes into the balloon
6
Q
Diffusion definition
A
Movement of molecules
High concentration to low concentration.
