new_n_lost
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But Still Most of Us Get it Wrong or Get Confused. The Idea is to Answer the Question in Less than 15 seconds.
Which of the following would shift the oxygen-hemoglobin dissociation curve to the right?
A. Carbon monoxide poisoning
B. Decreased PCO2
C. Decreased pH
D. Decreased temperature
E. Decreased 2,3-DPG
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| drhouse
Forum Senior
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i answered in 7 sec..
ans is C
main idea is i dont remember it on the base of pH but on the base of H+
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| paganini
Forum Senior
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C
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Mr. Physiology. An answering machine.
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| P4a99
Forum Fanatic
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(c) ? ... 37 sec 
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| paheli
It'sAllAboutGoodKarma
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C
10 secs including reading the stem. no, really!
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| GOGETA
I'm Dr. GOGETA
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paheli wrote:
C
10 secs including reading the stem. no, really!
You avatar said no showing superpowers
C i did not count but was fast.
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| new_n_lost
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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
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| new_n_lost
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The correct answer is C.
The loading of O2 is facilitated when the oxygen dissociation curve shifts to the left, and the unloading of O2 is facilitated when the oxygen dissociation curve shifts to the right.
A good way to remember the conditions that promote dissociation of O2 is to think of exercising muscle, which has decreased pH (choice C) because of the accumulation of lactic acid, increased PCO2 (compare with choice B) because of the increased rate of aerobic metabolism, increased temperature (compare with choice D), and increased 2,3-DPG (2,3-diphosphoglycerate; compare with choice E) because of increased glycolysis.
Carbon monoxide poisoning (choice A) left-shifts the oxygen dissociation curve, which interferes with the unloading of O2. Carbon monoxide also strongly binds to available sites on hemoglobin.
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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
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| P4a99
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once again "professional"
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| paheli
It'sAllAboutGoodKarma
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drhouse wrote:
main idea is i dont remember it on the base of pH but on the base of H+
but you do have to remember which way you remember!! i usually forget that!! and spend unnecessarily more time on such qns. the mle exma setters must love students like me, and i think they make up such qns just to trip up folks like me!!
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Prepare as if you're the worst, Perform as if you're the best! As you dream, so you manifest. So, DREAM BIG!! When you face hardship, remember, God never gives you more than you can handle. Keep your face to the sunshine and you cannot see the shadows.
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| Ig F
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C.............it took me 10 secs........
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| edie
I can, and I will.
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C. 3 secs  Shifts to RIGHT: Everything increases except pH
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