Inspiration on the flow-volume loop occurs under the X-axis.
Expiration on the flow-volume loop occurs above the X-axis.
a) Inspiration on the flow-volume loop occurs above the X-axis
b) Expiration on the flow-volume loop occurs below the X-axis
c) Inspiration on the flow-volume loop occurs below the X-axis
d) Expiration on the flow-volume loop occurs above the X-axis
