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18 Cards in this Set
- Front
- Back
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Primary Function of lungs |
Means of gas exchange |
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Secondary Functions (2) |
Acid Base Balance Reservoir for Blood |
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Major Muscle involved with inspiration |
Diaphragm |
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Major Muscle involved with Exhalation |
Abdominals |
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Dalton's law of partial pressure |
total pressure exerted is equal to the sum of the partial pressures of the individual gases
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P1O2= |
.2093 X 760 mmhg= 159 mmhg |
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99% of Oxygen is transported via.... |
Hemoglobin |
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O2 Hem dissociation curve is ____ and increases sharply up to a PO2 of _____ |
Sigmoidal, 40 mmhg |
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Curve plateaus around |
90-100 mmhg |
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Causes of a right shift of the O2 curve (3) |
Increase in H+. Temperature increase, and 2-3 DPG |
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A shift to the right means a _______ in Affinity of oxygen for HB |
Reduction |
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Three forms of CO2 that is transported |
Dissolved CO2 (10%) Carbamino-Hemoglobin (20%) HCO3- (70%) |
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CO2 + H2O H2CO3 H+ + HCO3- |
A reaction that is done in pulmonary ventilation that results in removal of H+ |
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What occurs at work rates greater than the lactate threshold? |
Hyperventilation |
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Rest to work transition |
Ventilation increases quickly at onset of exercise, but rise slows towards steady state |
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Where is the respiratory control center located? |
Medulla Oblangata |
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Two things that results in an increased alveolar ventilation |
Increase in PCO2 or decrease in PO2 |
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Name the three schools of thought concerning the control of breathing during exercise |
Neural Hypothesis Humoral Hypothesis Neural-Humoral Hypothesis (Most common) |
