Oxygen in Human Physiology
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Question 1 of 9
1. Question
1 point(s)Which of the following gas laws dictates the factors affecting the diffusion of a gas across a fluid membrane and is mathematically represented by the formula DR = KA(P2 – P1)/d?
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Question 2 of 9
2. Question
1 point(s)A 35-year-old female with estimated weight of 50 kg has been brought to the ED intubated and being ventilated by hand by the paramedic. She is believed to have taken an overdose of a tricyclic antidepressant.
You decide to transfer her to the ventilator system in the resuscitation room. What is the maximal tidal volume you should set for this patient?
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Question 3 of 9
3. Question
1 point(s)The patient from Question 2 subsequently regains consciousness in the department and is put on a 30% Venturi mask. An ABG done 30 minutes after initiation of this level of oxygen therapy gives the following results:
pH : 7.25
PCO2 : 4.1
HCO3- : 14.6
PO2 : 15
Which statement best describes the current physiological state of this patient? -
Question 4 of 9
4. Question
1 point(s)With regard to the oxygen-haemoglobin dissociation curve, which of the following statements is most accurate?
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Question 5 of 9
5. Question
1 point(s)Which of the following factors does not cause a right shift of the oxygen-haemoglobin dissociation curve when its value increases?
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Question 6 of 9
6. Question
1 point(s)The fall in partial pressure of oxygen from the atmosphere to the alveolus is contributed by all of the following except:
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Question 7 of 9
7. Question
1 point(s)A patient has an alveolar PO2 of 8 kPa and a systemic arterial PO2 of 7.5 kPa. What is the most likely explanation for these values?
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Question 8 of 9
8. Question
1 point(s)The fetal circulation maximises oxygen delivery by which of the following?
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Question 9 of 9
9. Question
1 point(s)Which of the following is not a recognised type of hypoxia in the clinical setting?
Excellent module on physiology of tissue oxygenation
Very useful