A patient has severe uncompensated respiratory acidosis. Temperature is normal and hemoglobin concentration is within the reference range. Which of the following oxygen dissociation curves best describes the relationship between oxygen content and PO2 (the solid curve is normal) in this patient

What is the functional residual capacity of a subject with the following volumes? Vital capacity- 4250 Expiratory reserve volume- 880ml Inspiratory reserve volume 2900ml Residual volume- 1050ml

Asthma is a common obstructive disease of the airways of the lungs, which can be diagnosed using the pulmonary function test, spirometry. Which of the following statements is most likely to indicate a patient with an obstructive pulmonary disorder?     Spirometry test results indicating an increased forced vital capacity.     Spirometry test results indicating a forced expiratory volume of 85% compared to predicted values.     Spirometry test results indicating an FVC/FEV1 ratio of 0.9.     Spirometry test results indicating a forced expiratory volume of 72% compared to predicted values.

Helium gas is maintained at a partial pressure in alveolar gas of PHe,alv= 10 mmHg. Blood flow through the lungs is 5 L/min, the permeability surface area of the alveolar blood-gas barrier is PHe,M S= 100 mL/s, and Bunsen solubility coefficients for He in blood and barrier are a*He,blood= 0.008 mL He/(mL blood* atm) and a*He,M= 0.08 mL He/(ml blood* atm), respectively. Helium is not present in the inlet blood. Find the He flow across the microvascular barrier of the lung. Compare this with the maximum helium exchange for very high flow rates (diffusion limited). Compare the result in part (a) with the He flow when the permeability is very high (flow- limited).

Does carbon dioxide move from the blood to the tissue cells or from the tissue cells to the blood and Why does it move in this direction (use it's partial pressures)?

Why is the oxygen-hemoglobin dissociation curve so steep?

Because CO2 and H+ are linked in a dynamic equilibrium, PCO2 changes will affect both H+ and HCO3- levels.  In the scenarios below, use "up" arrow or "down" arrow to indicate changes to PCO2, H+, and HCO3-.                                                       If ventilation increases, plasma PCO2 ______________, H+ ______________, and HCO3- ___________________                                   If ventilation decreased, plasma PCO2 _____________, H+ ______________, and HCO3- __________________