BI 255 HUMAN PHYSIOLOGY, WASHBURN UNIVERSITY EXAM 3 RESPIRATORY SYSTEM QUESTIONS WITH CORRECT ANSWERS

Describe the oxyhemoglobin dissociation curve and what 5 factors can shift it, and in
which direction


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, Increasing slope to the right
(Relatioship between Press of O2 and % saturation)
1. Temp= + temp causes right shift, decrease affinity for O2
2. pH= - pH, right shift
3. CO2= + CO2, right shift
4 DPG= + DPG
5. Fetal hemoglobin= left shift, =higher affinity for O2




Which way does the carbonic anhydrase reaction occur in regards to CO2 levels?


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Tissues have elevated CO2 levels = -->
Lungs have low CO2 levels= <---




Diffusion rates of lung gas exchange depend on what 5 things?


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1. Surface area (alveoli)
2. Diffusion gradient (ventillation)
3. Distance of diffusion (2 cells)
4. Temperature (constant)
5. Permeability (to gases)




What are the bones and mscles associated with the respiratory system?


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, Ribs
Diaphram
Intercostals
Sternocleidomastoids
Scalenes




Tidal volume: (TV)


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Volume of air moved in regular breathing




Hypeventilation:


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Fast, deep breaths
High alveolar ventilation
=O2 increases
=CO2 decreases




What is dead space in the lungs?


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Anywhere we dont get gas exchange
(Conducting zone = no gas exchange)