BIOLOGY QUESTIONs...POST ALL QUESTIONS HERE

[sksuriza]

no.....
in 1st we r giving temp aspect
in 2nd y chromosome

 

[Muhammad Talha]

no.....
in 1st we r giving temp aspect
in 2nd y chromosome

But they both r referred to sex....

 

[sksuriza]

another point the reptile child develops in egg....

 

[sksuriza]

u can comment on internal n external development of childre of reptile n man

 

[Silent Hunter]

WHAT EXACTLY IS NEGATIVE FEEDBACK?

 

[sksuriza]

its a response to a stimuli
in whch the conditions are returned to normal..
ie if blood glucose level rises above normal a negative feedback will initiate n bring it back to normal.. by increasing production of insulin n uptake of glucose by cells

 

[sksuriza]

its a response to a stimuli
in whch the conditions are returned to normal..
ie if blood glucose level rises above normal a negative feedback will initiate n bring it back to normal.. by increasing production of insulin n uptake of glucose by cells

 

[unfortunatediva]

can anyone help me out in dis ??! bio may june 2009 p2 2b ??! involving lethal combination ?

 

[sksuriza]

lethal combinition DD
explanation....
gve refereence of a part...3:1 in a
as the phenotype becomes 2:1
so 1 yellow coloured is lethal combinition....
1 yellow is different so lethal

 

[Silent Hunter]

another thing.................CAN ANYBODY EXPLAIN THE FLEXOR MUSCLES AND EXTENSORS MUSCLES?? RELATING TO BICEPS/TRICEPS AS EXAMPLES?

 

[sksuriza]

is this vocabulary in our syllabus??

 

[sksuriza]

flexor is the bisceps n extensor is triceps...


correct me if i m wrong

 

[abcde]

^correct!

 

[VelaneDeBeaute]

@silenthunter,
u know muscles work ironically....
so v start 4m here...
bending a joint is flexion...so a muscle causing flexion is a flexor
and straightening is extension...so a muscle causing extenion is a extensor
Now,
biceps lies on humerus..
it has 2 tendons originating at scapula...
its lower end has a tendon on the radius...
the contraction of biceps causes the arm to be pulled upwards towards the scapula...
And so is this flexion..!!
Triceps hve 3 tendons on humerus and origin on scapula...
its lower end continues as a single tendon inserted on the olecranon process of ulna...
therein contraction of triceps brings abt the extension of forearm at low elbow joint..!!

And this dig...not much of a help but gives a rough idea...
http://www.shapefit.com/build-big-guns-men-2.jpg


Hope i helped..!!

 

[sksuriza]

is it in syllabus??

 

[VelaneDeBeaute]

sksuriza....if not being in syllabus gives u a better idea and explanation...there's no harm in wasting a minute reading it..!

 

[sksuriza]

i have learnd tht post by heart.... but ws jxt askn tht if its imp i shd tell my frnds too... i have learned it

 

[VelaneDeBeaute]

Yeah u shud tell 'em....
if u help others...God will help u too in times ov need..!

 

[sksuriza]

ya m gonna tll thm 1st thng on mon!!!

 

[abdullahsatar]

another thing.................CAN ANYBODY EXPLAIN THE FLEXOR MUSCLES AND EXTENSORS MUSCLES?? RELATING TO BICEPS/TRICEPS AS EXAMPLES?

extensor muscles are the ones which help in the extension of parts of the legs. those muscles which will help in extending the leg and foot are the extensor ones.