1. Which of the following is a property of the pulmonary circulation? a) An incr

Question

1. Which of the following is a property of the pulmonary circulation? a) An increase in PACO2 results in a decrease in PVR. b) An increase in PACO2 results in an increase in PVR. c) PACO2 is unrelated to PVR. 2. Which statement is correct? a) If tidal volume increases (and breathing frequency is held constant), alveolar ventilation decreases while dead space ventilation is unchanged; If respiratory frequency increases, both alveolar ventilation and dead space ventilation increase b) If tidal volume increases (and breathing frequency is held constant), alveolar ventilation decreases while dead space ventilation is unchanged; If respiratory frequency increases, both alveolar ventilation and dead space ventilation decrease c) If tidal volume increases (and breathing frequency is held constant), alveolar ventilation increases while dead space ventilation is unchanged; If respiratory frequency increases, both alveolar ventilation and dead space ventilation increase d) If tidal volume increases (and breathing frequency is held constant), alveolar ventilation increases while dead space ventilation is unchanged; If respiratory frequency increases, both alveolar ventilation and dead space ventilation decrease 3. Under physiologic conditions which metal is covalently attached to the heme of hemoglobin? a. Cu2+ b. Zn 2+ c. Fe2+ d. Fe3+ 4. The predominant form of CO2 in blood: a) CO2 combined with protein on the inside of red blood cell b) HCO3- c) CO2 dissolved as gas d) Above forms of CO2 are equal to one another 5. To obtain a reasonable idea of the acid-base state of a patient's blood, you would need to know the a) pH and PaO2 b) PaCO2 and PaO2 c) PaCO2 and HCO3 d) pH and SaO2 (%saturation of hemoglobin with oxygen) 6. Which stimulate breathing? a) Increasing PaCO2 b) Decreasing PaO2 c) Decreasing pH d) All of the above

Explanation / Answer

1. A 2. C 3. C 4. B 5. D 6. C

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