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bio ppr1 question

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Sue T:
the question s attached (n08 q26)
i get tht th point must be on the curve AD (low CO2) not CB (high CO2)-- but y is the ans D?
isnt the muscle resting? y would it need oxygen???!

and q 36 -th ans is D but-  what does glabal warming have 2 do wth malaria???!!!

unknown 101:

--- Quote from: Sue T on May 25, 2010, 02:06:46 pm ---the question s attached (n08 q26)
i get tht th point must be on the curve AD (low CO2) not CB (high CO2)-- but y is the ans D?
isnt the muscle resting? y would it need oxygen???!

and q 36 -th ans is D but-  what does glabal warming have 2 do wth malaria???!!!

--- End quote ---

ok so if a muscle is resting, then the oxygen dissociation curve would be higher ( the AD one ), if its excersicing the its the lower one as oxygen needs to be released fast ( for respiration in the muscle )
the muscle is resting, but it needs to respire ( its like me telling you, why do u breathe when ur sleeping, lol ). its usually because in the viens in the parts of ur body ( they are usually next to the muscles, ans so the muscles contract, causing the blood to go back to the heart against gravity )

q36: 1st and 3rd are difinantely correct, the 2nd option ( about global warming ), maintains the optimum temperature at which these mosqitos grow, so its correct

hope this helped.. :)

Sue T:
thank u

unknown 101:

--- Quote from: Sue T on May 25, 2010, 03:14:32 pm ---thank u

--- End quote ---

anytime :)

Sue T:
Which  is characteristic of phloem sieve tubes?
solute potential of
the cell content:        high or low?
the ans is low but y low? isnt phloem sap filled wth sucrose n aminos?

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