10 November 2008 Finish Ch 12 Cardiovascular Begin Ch 14 Respiratory Physiology Lab this week: Frog...
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10 November 2008
• Finish Ch 12 Cardiovascular• Begin Ch 14 Respiratory Physiology• Lab this week: Frog heart physiology
– Review actions of ACh, Atropine, and EPI– Effects of temperature on HR– Producing heart blocks– Double-pithed
• Syllabus change: Digestion moved to end
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RespiratoryPhysiologyThe physics of air flow1) Flow in tubes2) Ventilation
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• Respiration is the overall movement of gases between the outside environment and the internal cells
O2
O2 CO2
CO2
But Carbon Dioxide reacts with water!
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The major parts of the “airways,” along which air movements (ventilation) occur during breathing.
Upper
Respiratory
Tract
The Structure underlying the function:
Lower
Respiratory
Tract
BronchitisAsthma
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Upper Tract Sleep Apnea & CPAP
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Continuous Positive Airway Pressure
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Larynx
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The major parts of the “airways,” along which air movements (ventilation) occur during breathing.
Lower
Respiratory
Tract
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Surgical resectionSurgical resection
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Pulmonary arterial blood = low in O2Pulmonary arterial blood = low in O2
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Figure 22.10
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The relaxation/contractionof circular smooth musclelining these “airways’” determines how easily airflow can occur(bronchodilation vs.bronchoconstriction).
Most gas exchange occurs in the~8,000,000 alveolar sacs.
Figure 13-2
Anat
omic
alD
ead
Spac
e
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• What does a river delta and your lungs have in common?
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Figure 13-2
Anat
omic
al D
ead
Spac
e
Impaction
Sedimentation
Brownian Diffusion
Particle Filtration: deposition varies
DecreaseIn FlowRate
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RespiratoryEpithelium
Mucus escalator
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Figure 22.5
Smoker’s hackSmoker’s hack
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