Physics, Chemistry and Biology: Post your doubts here!

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The Mighty Nobody said:
so what you're saying is due to the fact that the stored glycogen can be converted to glucose any time and taken up by the ileum so there is always glucose available in high concentration for the small intestine and it never becomes low for the incoming glucose ingested to be diffused and not absorbed by active transport? :eek: Did I get you right? :rolleyes:o_O
Isn't there like a possibility that there isn't enough glycogen available for conversion and the concentration of glucose does decrease in the body and then there might be diffusion? :whistle:
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umm........wat i said about glycogen and liver and stuff i did not relate it to the ileum becuz im also weakin that part i dont get the active transport part too!
 
Bilal ashraf

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someone help
i dont understand how platelets help in blood clotting..
They just conver fibronegon to fibrin...thats it?
 
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i have a doubt in this question
CaCo3+2Hcl>>CaCl2+CO2+H2O
one piece of marble 0.3g was added to 5cm3 of Hcl concentration 1.00 mol/dm3 which reagent is in excess?
mass of 1 mol of CaCO3=100g
no. of mol of CaCO3=?
no.of mol of Hcl=?
reagent in excess=...............
reason=.........................
calculate maximum no.of volume of CO2 produces=.....
pls solve and explain if you ca as asoon as possible....
 
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Bilal ashraf said:
someone help
i dont understand how platelets help in blood clotting..
They just conver fibronegon to fibrin...thats it?
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When an injury causes a blood vessel wall to break, platelets are activated. They change shape from round to spiny, stick to the broken vessel wall and each other, and begin to plug the break.


The platelets also interact with fibrinogen, a soluble plasma protein, to form insoluble fibrin. Calcium is required for that.

Fibrin strands form a net that entraps more platelets and other blood cells (red cells and white cells), producing a clot that plugs the break.
 
Lola_sweet

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the contraceptive method of Intra Utrine Device (IUD) where is it placed in the female reproductive system?
 
Lola_sweet

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Mai(M4!) said:
in the uterus
it is shaped like T and its head should be placed against the top uterus wall to stop implantation
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thnk u!
can u clear this doubt i ve
co-dominance: an example could be a red flower with white spots
incomplete dominance: an example could be a pink flower! with the alleles of a red and white flower!
 
Akshajistari

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the contraceptive method of Intra Utrine Device (IUD) where is it placed in the female reproductive system?
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It prevents the a blastula( formed after the zygote has multiplied several times after fertilisation) from implanting in the uterine wall
 
Akshajistari

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another qs: why is glucose converted into glycogen rather than kept as glucose inside the cells?
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Because glucose is soluble in water and would affect the concentration gradient for osmosis. If there was too much glucose in a cell, water would diffuse in but as animal cells do not have a cell wall, the cells will burst( cytolysis)
 
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