Respiratory exam 2
Respiratory Exam Quiz
Test your knowledge on the complexities of respiration and gas exchange with this engaging quiz! Dive into questions about the oxygen dissociation curve, gas partial pressures, and myoglobin's role in the body.
- Multiple choice questions
- Assess your understanding of respiratory physiology
- Perfect for students and professionals alike
O2 dissociation curve is shifted to right by:
A- Blood pH 7.48
B- Hyperthermia
C- Decreased concentration of 2,3 DPG in red blood corpuscles.
D- CO poisoning
E- Presence of Fetal hemoglobin.
All of the following partial pressures of gases in air are true except:
A- The pCO2 in alveolar air is 40 mmHg
B- The pCO2 in expired air is 30 mmHg.
C- The pH2O in both alveolar & expired air is 47 mmHg
D- The pO2 in alveolar air is 100 mmHg.
E- The pO2 in expired air is 80 mmHg.
Which of the following partial gas pressures is false:
A- Expired pO2 116
B- Inspired pO2 158
C- Inspired pH2O 47
D- Inspired pCO2 0.3
E- Expired pN2 565
In the O2 dissociation curve, all of the following is true except:
A- Its characteristic Sigmoid shape is due to progressive increased affinity of Hb to combine with O2
B- At pO2 100 mmHg, Hb is about 95% saturated.
C- At PO2 40 mmHg, Hb is about 70% saturated.
D- It`s shifted to left in case of decreased blood temperature
E- It`s shifted to right with increased 2,3DPH & blood pH.
F- A decrease in pO2 from 100 to 60 mmHg has little effect on O2 saturation
About Myoglobin, all of the following is true except:
A- O2 disociation curve has a rectangular hyperbola shape
B- It`s shifted to left of the Hb-O2 dissociation curve
C- It has a higher affinity than blood Hb.
D- It has a low affinity to O2 at low pO2
O2 delivery to tissues depends on the:
A- Amount of O2 entering the lungs
B- Adequacy of pulmonary gas exchange.
C- Blood flow rate to the tissues.
D- Capacity of blood to carry O2
E- All of the Above.
About O2 transport, all of the following is true except:
A- O2 flows downhill from air to alveoli then to arterial blood then to tissues.
B- In blood, O2 is present only in chemical combination with Hb
C- pO2 at the arterial ends of pulmonary capillary is 40 mmHg
D- pO2 at the venous ends of pulmonary capillary is 100 mmHg.
Which of the following statements is wrong:
A- Lack of 2,3 DPG shifts the O2 curve to the right.
B- If a blood sample having normal amount of Hb contains 2 ml O2, the hb saturation with O2 is 10%.
C- The O2 dissociation curve is most steep at pO2 from 40~20 mmHg
D- Myoglobin acts as a store of O2 in skeletal muscles.
Which of the following is wrong partial pressure in alveolar level:
A- pCO2 = 40 mmHg
B- pN2 = 573 mmHg
C- pO2 = 100 mmHg.
D- pO2 = 130 mmHg
E- pH2O = 47 mmHg
Which of the following statements in incorrect:
A- In upright position, V/Q is normally lowest in lung bases.
B- In upright position, lower lung zones are more compliant compared to upper lung zones.
C- In upright position, blood flow is greater at the lung bases than the apices.
D- In upright position, V/Q is normally highest in the lung apices.
E- Positive intrapleural pressure during forced expiration prevent airways from closing.
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