which of the following is NOT charcterstic of carbon monoxide poisoning?
A. Decreased arterial partail pressure of oxygen.
B. Increased affinity for Hb.
C. no change in alveolar ventilation.
D.decreased arterial Oxygen concentration.
E. Shifting of oxy hemoglobin curve to left.
answer is D plz explain how
Q..how many nadh are produced in one turn of kreb's cycle starting with 2 molecules of pyruvate
i thought 6 but answer is 8....
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I found a source that had a similiar question, but other answer.
Features of mild carbon monoxide poisoning include:
A: decreased arterial PO2.
B: decreased hemoglobin-oxygen affinity.
C: increased alveolar ventilation.
D: decreased arterial O2 concentration.
E: all of the above.
The answer is D. - decreased arterial O2 concentration.
Carbon monoxide poisoning causes some of the hemoglobin in the blood to be combined with CO to give carboxyhemoglobin. As a result, there is a decreased arterial O2 concentration (choice D is correct). However, it is important to realize that this does not decrease the arterial PO2. In this respect, carbon monoxide poisoning is similar to anemia where again the arterial PO2 is typically normal but the arterial oxygen concentration is reduced.
Choice B is not correct. There is an increase in the affinity of the hemoglobin for oxygen as evidenced by the leftward shift of the oxygen dissociation curve. Thus, carbon monoxide poisoning causes a fall in tissue PO2 for two reasons: first less oxygen is carried in the arterial blood, and second the unloading is impeded by the higher hemoglobin affinity.
Choice C is incorrect. Ventilation is unaffected in mild carbon monoxide poisoning; the chemoreceptors respond primarily to the arterial PO2 and, because this is normal, ventilation remains essentially unchanged.
The word mild is included in the stem of the question because with very severe carbon monoxide poisoning there may be brain damage which may alter ventilation.
http://www.mountain-research.org/teaching/pulmonary.htm#answer12