GMS6402: MEDICAL PULMONARY

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GMS6402: MEDICAL PULMONARY

PHYSIOLOGY EXAM QUES TIONS

WITH 100% CORRECT AN SWERS

Question :Spans from Z0 to Z16. Volume of air held is

_____ mls. No gas exchange takes place.

Correct answer:150

Question :During normal breathing, there is about ____ to

____ mls of air in the alveolar airways.

Correct answer:2500‐3000

Question :_____‐ No cartilage and significantly less

smooth muscle. Remember, no gas exchange here.

Correct answer:Terminal Bronchioles (Z16)

Question :The path of oxygen diffusion‐

Correct answer:1. Alveolar fluid 2. Alveolar epithelium 3.

Epithelial basement membrane 4. Interstitial space 5 Capillary basement membrane 6. Capillary endothelial cell membrane 7. Blood 8. Red cell membrane

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Question :What are the muscles involved with

inspiration?

Correct answer:Main muscle of inspiration is the

diaphragm.Secondary inspiratory muscles are the external intercostals and sternocleidomastoids. We use these during exercise.

Sternocleidomastoid elevates sternum.Scalenus elevates and fix upper ribs.Parasternal intercartilaginous muscles elevates ribs.External intercostals elevates ribs.

Diaphragm: domes descend, increasing longitudinal

dimension of chest and elevating lower ribs.

Question :What are the muscles involved with expiration?

Correct answer:TIDAL VOLUME expiration is passive

(ie, we use the recoil of the lung to push air out).

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Secondary expiratory muscles include the internal intercostals and the abdominal muscle. When they contract, they work with the recoil to forcefully push air out of the lungs.

Internal intercostals except parasternal intercartilaginous muscles (depresses ribs).Abdominal muscles depresses lower ribs, compresses abdominal contents.Rectus abdominis.External oblique..Internal oblique.Transversus abdominis.

Question :When the diaphragm contracts during

inspiration, it moves .When it relaxes during expiration, it moves.

Correct answer:Down

Up

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Question :____ is the amount of air inhaled/exhaled with

a normal breath from the resting level (~____ L)

Correct answer:Volume (VT)

0.5

Question :_____ is the amount of air that remains after

maximal expiration (~____ L).

Correct answer:Residual volume (RV)

1.2

Question :____ is the volume of air that can be expelled

after normal tidal volume expiration (~____ L).

Correct answer:Expiratory Reserve Volume (ERV)

2

Question :_____ is the amount of air which can be

forcibly exhaled from the lungs after taking the deepest breath possible (~____ L)

Correct answer:Forced Vital Capacity (FVC)

5