q.3_____________? - sarim

[ArchivalUser]

hi Sarim...can you please explain...

according to robbins 8th edition...
pg 1260
type 2 fibers atrophy in disuse...type 2 fibers hypertropy in response to increase load...

so i am confused about myofibrils...

can u pleases give the explanation

thanks

[ArchivalUser]

In "Disuse Atrophy"...... it is the "SIZE of Fibers" get decreased and "NOT the # of Fibers"


and the "Fibers Size" get shrinked cz of "Decrease in # of MyoFIBRILS"


it will be correct to say:

*Decreased in Cross-section area of Fibers
*Decrease in Mass of Fibers
*Decreased in #of MyoFIBRILS per MyoFIBER



and yes it is the* Type II (Fast twitch) fibers Selectively get atrophied in "DIS-use Atrophy"




-just read about the following terms and look at some images and it will all make sense then.

.MyoFILAMENTS

.MyoFIBRILS

.MyoFIBERS (aka MyoCYTES)



**** HY

[ArchivalUser]

thanks for the nice explanation sarim
i completely overlooked the number of fibres part..

[ArchivalUser]

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