Ventilation II: Mechanics of Inspiration and Expiration Video Lessons

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Problem: Refer to the table below.                                                      One breath cycle    Inhalation      ExhalationPosterior air sacsExpand; fills with fresh airContract; pushes air into lungLungAir flows through from posterior to anteriorAir flows through from posterior to anteriorAnterior sacs Expand; pulls stale air from lungContract; pushes stale air out through tracheaA student creates the table above as a study guide. Evaluate the accuracy of the information shown. a) The information is not accurate because the anterior air sacs push air when they expand and pull air when then contract. b) The information is not accurate because air sacs expand during exhalation and contract during inhalation. c) The information shown is accurate. d) The information is not accurate because air does not flow through the lungs during exhalation.

FREE Expert Solution

During Inhalation:

Posterior Air Sacs: Expands

Lungs: Air flows from posterior to anterior air sacs

Anterior Air Sacs: Expands

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Problem Details

Refer to the table below. 


                                                     One breath cycle

    Inhalation  

    Exhalation

Posterior air sacs

Expand; fills with fresh air

Contract; pushes air into lung

Lung

Air flows through from posterior to anterior

Air flows through from posterior to anterior

Anterior sacs 

Expand; pulls stale air from lung

Contract; pushes stale air out through trachea


A student creates the table above as a study guide. Evaluate the accuracy of the information shown. 

a) The information is not accurate because the anterior air sacs push air when they expand and pull air when then contract. 

b) The information is not accurate because air sacs expand during exhalation and contract during inhalation. 

c) The information shown is accurate. 

d) The information is not accurate because air does not flow through the lungs during exhalation.

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