ANATOMY

Detailed explanation-1: -Raising the rate or the tidal volume, as well as increasing T low, will increase ventilation and decrease CO2.

Detailed explanation-2: -Hold your breath for 20 seconds, or for as long as you can. While holding your breath, gently raise your arms above your head. Once you have finished counting, slowly bring your arms down and exhale throughout your mouth, coming back to a relaxed position. Repeat 4 times.

Detailed explanation-3: -Alveoli. Minute ventilation is the tidal volume times the respiratory rate, usually, 500 mL × 12 breaths/min = 6000 mL/min. Increasing respiratory rate or tidal volume will increase minute ventilation.

Detailed explanation-4: -Adaptations of the alveoli: Moist walls-gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls-allow gases to pass through. Extensive blood supply-ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.