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PCB 2061L Study Guide - Quiz Guide: Lung Volumes, Tidal Volume, Spirometry

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olivecattle778
3 Aug 2017
School
FIU
Department
Process Biology
Course
PCB 2061L
Professor
Maureen Walter

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Document Summary

Dl combines: the diffusion coefficient of the gas, the surface area of the membrane, and *the thickness of the membrane. In fibrosis, the diffusion of o2 is restricted because thickening of the alveolar membrane increases diffusion distance. In emphysema, the diffusion of o2 is decreased because the surface area for diffusion of gases is decreased. Is the volume inspired or expired with each normal breath. Is the volume that can be inspired over and above the tidal volume. Is the volume that can be expired after the expiration of a tidal volume. Is the volume that remains in the lungs after a maximal expiration. Is defined as the volume of the lungs that does not participate in gas exchange. Is approximately equal to the anatomic dead space in normal lungs. May be greater than the anatomic dead space in lung diseases in which there are ventilation/perfusion (v/q) defects. Is the sum of tidal volume and inspiratory reserve volume (irv).

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Related Questions

PHYSIOLOGY

11. A subject is connected at FRC to a bag containing 2L of 8% He, 92% O2. He rebreathes from the bag until mixing is complete; at which time the fraction of He is 4.6%. What is the value of FRC?

A. 1.15L

B. 1.48L (can you please explain this answer)

C. 2.48L

D. 3.48L

E. It cannot be calculated from the information given

The minimum time it takes a normal person to go from residual volume (RV) to total lung capacity (TLC) is less than the minimum amount of time to go from TLC to RV. The most probable explanation for this effect is:

A. the chest wall tends to spring outward when the respiratory system is at RV.

B. the chest wall is less compliant at RV.

C. inspiratory muscles are stronger than expiratory muscles.

D. the lungs have less recoil at TLC.

E. the airways tend to collapse during forced expiration. (can you please explain why this is the answer)

Two gases, A and B have the same partial pressure difference across the alveolar capillary barrier. Gas A has a molecular weight of 36 and solubility of 24 while gas B has a molecular weight of 16 and solubility of 2. What is the rate of diffusion of gas A through the barrier compared to gas B?

A. 12:1

B. 8:1 (can you explain why B is the answer?)

C. 6:4

D. 4:1

E. They are the same.

If an individual with a tidal volume of 500 ml and a dead space volume of 100 ml were to exercise and double the CO2 production, with no change in respiratory rate, what tidal volume would be required to maintain their original PCO2 of 40 mm Hg?

A. 1200 ml

B. 1100 ml

C. 1000 ml

D. 900 ml (can you explain why the answer is D?)

E. 800 ml

39. What is the total amount of oxygen in the arterial blood (in ml O2 /100ml blood) of an individual who has PO2=90mm Hg, PCO2=40mm Hg, Hb=15g/100ml, hemoglobin saturation = 95%, (solubility coefficient of O2=0.003 ml O2/100 ml blood/mm Hg; at saturation Hb binds 1.34 ml O2/g)

A. (0.95 x 15) + (95 x 0.003)

B. (90 x 1.34 x 15) + (95 x 0.003)

C. ((90 - 40) x 1.34 x 0.95) + (90 x 0.003)

D. (0.95x 1.34 x 15) + (90 x 0.003) (can you explain why the answer is D?)

E. none of the above