Bio 449Lecture 23Nov. 1, 2010 Respiratory Physiology III Alveolar gas composition Atmospheric gases...
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Transcript of Bio 449Lecture 23Nov. 1, 2010 Respiratory Physiology III Alveolar gas composition Atmospheric gases...
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Bio 449 Lecture 23 Nov. 1, 2010
Respiratory Physiology IIIAlveolar gas compositionAtmospheric gasesPartial pressuresEffects of ventilation patternAnatomical dead spaceAlveolar gases
Blood Gas Transport IBlood compositionOverviewHemoglobinDiffusion of gasesPartial pressures IIAlveolar-blood gradientsOxygen transportOxygen affinity
Terms to KnowPartial pressure Tidal volumeAnatomical dead spaceMinute ventilationAlveolar ventilation PlasmaErthyrocytes (red blood cells or RBC's) Hematocrit Hemoglobin Heme Globin Oxygen carrying capacity Oxygen affinityOxygen saturation curve
ReadingsLectures 23-24: Chapter 16, pages 547-558Chapter 18
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Alveolar gas composition
Atmospheric gases
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Partial pressures
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Alveolar ventilation
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Alveolar ventilation
Fig. 17-14
2
3
4
1
150
150mL
350
150
2700 mL
2200 mL
2200 mL
150mL
2200 mL
150mL
150
350
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Alveolar gases
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Blood Gas Transport
Blood composition
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100%
� 58%plasmavolume
42%packedred cellvolume
<1%whitecells
MALES FEMALES
Hematocrit 40%–54% 37%–47%
Hemoglobin (g Hb/dL* blood) 14–17 12–16
Red cell count (cells/µL) 4.5–6.5 x 106 3.9–5.6 x 106
Total white cell count (cells/µL) 4–11 x 103 4–11 x 103
Differential white cell count
Neutrophils 50%–70% 50%–70%
Eosinophils 1%–4% 1%–4%
Basophils <1% <1%
Lymphocytes 20%–40% 20%–40%
Monocytes 2%–8% 2%–8%
Platelets (per µL) 150–450 x 103 150–450 x 103
*1 deciliter (dL) = 100 mL
Fig. 16-3
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Blood composition
Fig. 16-1
BLOOD
Gases such as
such asPlasma
Ions
Trace elementsand vitamins
O2
CO2
Proteins
Glucose
Lipids
Nitrogenouswaste
Globulins
Fibrinogen
Amino acids Albumins
Organicmolecules
Water
iscomposed
of
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Blood composition
Cellularelements
Red bloodcells
Whiteblood cells
Platelets
Lymphocytes
Monocytes
Neutrophils
Eosinophils
Basophils
include
m 0
5
10
15
BLOODis
composedof
Fig. 16-1
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Hemoglobin
Chain
Hemegroup
R = additional C, H, O groups
Porphyrinring
Chain
Fig. 18-8
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Diffusion of gases
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Oxygen transport