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bio mcq HELP......

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i need explanation for anser....i dont really know much about myoglobin....
 

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XPFMember

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Assalamoalaikum!!
well i'll give u sum info abt myoglobin!

Skeletal muscle contains a pigment called myoglobin. It is very similar to Hb but has a higher affinity for O2.
It will load with O2 as Hb unloads and will store the O2 in the muscle until it is required. It only releases the O2 when the pO2 is very low - when the Hb cannot supply O2 fast enough and the demand is great. The dissociation curve shifts to the left.

well i think this will help u understand as to y the answer is the highlighted choice :)
 
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"pO2 is very low"....where??.....inside the cells u mean ...?
and i just wanted to approve one more definition for diffusion that it is the movement from higher partial pressure of sumthing to lower partial pressure of the same thing.......
NB: SUMTHING can be any gas
 

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hmmmm...pO2 is low in the surrounding !!

definition i think it's correct..but i have a doubt...will check my notes :p
 
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