Pulmonary Ventilation

During normal quiet breathing, which muscle is primarily responsible for inhalation?

• Abdominal muscles

• External intercostals

• Diaphragm

• Sternocleidomastoid

QC During inspiration (1) atmospheric pressure   (2) alveolar pressure

• (1)>(2)

• (1)<(2)

• (1)=(2)

QC Alveolar pressure with alveolar radius of (1) 1cm   (2) 4cm

• (1)>(2)

• (1)<(2)

• (1)=(2)

QC Alveolar surface tension of an infant born at (1)  38 weeks (2) 30 weeks

• (1)>(2)

• (1)<(2)

• (1)=(2)

Volume of air inspired or expired

with each normal breath

• IRV

• ERV

• RV

• TV

volume of air remaining

in the lungs after the most forceful expiration

• IRV

• ERV

• RV

• TV

Composed of the expiratory reserve volume and residual volume

• FRC

• TLC

• IC

• VC

VR: (1) Alveolar ventilation (2) blood CO2 level

• inc in (1) will lead to inc in (2)

• inc in (1) will lead to dec in (2)

• inc in (1) will not lead to any change in (2)

This is NOT part of dead space air

• alveoli

• nose

• bronchi

• trachea

Lung Compliance of a person with (1) normal weight (2) morbid obesity

• (1) > (2)

• (1) < (2)

• (1) = (2)