RESPIRATION 2: Ventilation Flashcards
What law explains the mechanics of breathing?
Boyle’s Law – pressure and volume are inversely related.
What muscles are involved in inspiration?
Diaphragm and external intercostal muscles.
What muscles help in forced expiration?
Internal intercostals and abdominal muscles.
What happens to intrapulmonary pressure during inhalation?
It decreases below atmospheric pressure, allowing air in.
What is tidal volume?
Air inhaled or exhaled during a normal breath (~500 mL).
What is inspiratory reserve volume (IRV)?
Additional air inhaled after a normal inspiration.
What is expiratory reserve volume (ERV)?
Additional air exhaled after a normal expiration.
What is residual volume (RV)?
Air remaining in the lungs after a forceful exhale.
What is vital capacity (VC)?
VC = TV + IRV + ERV – maximum air exhaled after maximum inhalation.`
What is total lung capacity (TLC)?
TLC = VC + RV – the maximum volume the lungs can hold.
What is functional residual capacity (FRC)
Volume of air left in lungs after normal exhalation.
What is lung compliance?
The ability of the lungs to stretch and expand.
