Inspiratory reserve volume decreased due to the rapid increase in breath rate. Normal resting breath rate is at an average 11.6 breaths per minute increased to 27 breaths per minute after exercise. The increase in BR causes inspiration length to go below its normal 2 second interval. Therefore decreasing IRV by .6 Liters.
IC=IRV+TV. IRV decreased. However, TV increased which explains the .6 liter increase in IC. Tidal volume is affected by the amount of air that is increased per minute. After exercise the breath rate increased, which then increased the overall TV.
ERV+RV=FRC. The FRC, the amount of air left in the lungs after complete exhalation, decreased by .7 L because expiration is occurring much more forcefully. This leaves less air behind on the lungs.
ERV+RV=FRC. The FRC, the amount of air left in the lungs after complete exhalation, decreased by .7 L because expiration is occurring much more quickly. The medullary rhythmic are of the brain senses the increase need for the expulsion of C02; therefore increasing BR. This then lowers the ERV.
Residual volume is the result of gas exchange occurring. Therefore there will always be an echange of air molecules that occur at the same rate for that individual.
VC only measures the amount of air someone can expel from their lungs after deep inhaltion. For VC to increase or decrease the lungs would have to change in size or their level of functioning; exercise does not affect this.
The Total Lung Capacity is the amount of air allowed into the. The actual size of the lungs would have to increase or decrease to create a change in its capacity.
The intercostal muscles contract to