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These are questions from the topic FUNDAMENTAL UNIT OF LIFE. Please answer -

1] What is a cell membrane?

2] What is the meaning of the term \'selectively permeable\'?

3] What is osmosis?

4] What is diffusion.

5] How is glucose converted into energy inside the cells?

6] What actually is respiration?

7] How does substances like carbon - di - oxide and oxygen enter and exit a cell?

8] Where is the concentration of CO2 more? Inside a cell or outside a cell? Why?

9] Where is the concentration of oxygen more? Inside or outside a cell? Why?

10] What is meant by a solvent?

11] What is meant by a solution? What are the substances present in it?

12] Can glucose dissolve in blood?

13] What is a hypotonic solution?

14] What is an isotonic solution/

15] What is a hypertonic solution?

Asked by Krishnanunni(student) , on 14/5/12



Well, I m sure someone will answer your questions but seriously you need to open textbook and read, it 's all there.

Posted by Aviral Goel(student)on 14/5/12


1.Thecell membraneorplasma membraneis a biological membrane that separates the interior of all cells from the outside environment.

2.Asemipermeable membrane, also termed aselectively permeable membrane, apartially permeable membraneor adifferentially permeable membrane, is a membrane that will allow certainmoleculesorionsto pass through it bydiffusionand occasionally specialized "facilitated diffusion".

3.Osmosisis the net movement ofsolventmolecules through a partiallypermeablemembrane into a region of highersoluteconcentration, in order to equalize the solute concentrations on the two sides.

4.Diffusiondescribes the spread of particles through random motion from regions of higher concentration to regions of lower concentration.

5.aerbic or anaerobic respiration.

6.the physiological process that enables animals to exchange carbon dioxide, the primary product of cellular respiration, for fresh air

7.Simple diffusion. Oxygen and carbon dioxide can both go directly through the lipid bilayer.

8.the amount of carbon dioxide fluid is greater outside the cell then the carbon dioxide will diffuse in so that the amount of carbon dioxide inside and outside of the cell will be an equillibrium. it is more outdide due to respiration.

9. same as co2

10.Asolventis a liquid, solid, or gas that dissolves another solid, liquid, or gaseoussolute, resulting in asolutionthat is soluble in a certain volume of solvent at a specifiedtemperature.

11.nchemistry, asolutionis ahomogeneousmixturecomposed of only onephase. In such a mixture, asoluteis a substancedissolvedin another substance, known as a solvent . Thesolventdoes the dissolving. The solution more or less takes on the characteristics of the solvent including its phase, and the solvent is commonly the major fraction of the mixture.

12. yes

13. its sol. which has lower osmotic pressure than any other sol.

14. its effective osmole concentration is the same as solute concentration of another. sol. with which its compared.

15. it has larger concentration of substance on the outside of a cell than is found within the cells themselves.

Posted by Divya Janjua(student)on 14/5/12


hey kahan se tepa hai tune divya

sorry just joking

nice and good answer

thumbs up for u

Posted by Raman Mishra(student)on 14/5/12



You have done a fabulous attempt and have succeeded in it about 85 percentage.

Here is a thumbs - up for you by me!

Posted by Krishnanunni(student)on 14/5/12


raman mein hamesha tepti hoon . tujhe pata hai.

Posted by Divya Janjua(student)on 15/5/12


Answers to all your questions are easily available in our study material chapter- 5, kindly go through it and try to answer yourself. If you don't understand any concept, do get back to us.

Posted by Shivali Joshi(MeritNation Expert)on 15/5/12

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