quick question about hydrophobic and hydrophilic

[billiondrag]

If something is hydrophobic, does it mean that it is lipophilic?

If something is hydrophilic does it mean that it is lipophobic?

can hydrophobic substances dissolve in water or do they just mix?

What happens when two polar molecules come into contact ( a polar molecule and the polar head of a phospholipid)?

Sorry if these questions sound stupid but i didnt do biology unit 1 and am still grasping the basics.

Thanks for the help.

[saheh]

I didn't do 1/2 either so i'll do my best from what I've done

Hydrophobic=lipophillic
Hydrophillic=lipophobic

Hydrophobic (non-polar) dont usually mix with water (think of what happens when oil and water are put together)

the last one: (to the best of my knowledge) They are attracted to eachother and pull together, and because for ex. water is small, it'll pass through the bilayer


anyone correct me if I'm wrong!!!

[billiondrag]

Thanks for the help it really cleared some things up for me.

 

[Shenz0r]

If something is hydrophobic, does it mean that it is lipophilic?

If something is hydrophilic does it mean that it is lipophobic?

can hydrophobic substances dissolve in water or do they just mix?

What happens when two polar molecules come into contact ( a polar molecule and the polar head of a phospholipid)?

Sorry if these questions sound stupid but i didnt do biology unit 1 and am still grasping the basics.

Thanks for the help.

Like dissolves like - hydrophilic substances dissolve in polar solvents (polar dissolves polar, so like glucose dissolves in water). Because lipids are non-polar, hydrophilic substances will not dissolve in lipids (because polar does not dissolve in non-polar) and hence it is lipophobic. If something is hydrophobic, it can only dissolve in hydrophobic substances, thus hydrophobic substances are lipophilic.

And it's because of the "like dissolves like" rule that water and oil don't mix (non polar does not dissolve in polar)

When two polar molecules come into contact, they can form dipole-dipole bonds and hydrogen bonds (weak intermolecular forces). These forces are very weak compared to covalent, ionic and metallic bonds and very little energy is needed to overcome them. You'll learn about this more so in Chemistry.

[LOLs99]

Lipophilic ( lipid loving)-  Hydrophobic ( water hating, which means love lipid )
 Lipophobic( lipid hating)- hydrophilic ( water loving, hence hate water)

 Lipo- lipid
Hydro- water
 

[happycat]

How come I was never taught about lipophillic and lipophobic? Perhaps I had a crappy teacher. I openly admit that this is new stuff for me and now I'm a uni student and what an embarassment that is.

[paulsterio]

How come I was never taught about lipophillic and lipophobic? Perhaps I had a crappy teacher. I openly admit that this is new stuff for me and now I'm a uni student and what an embarassment that is.

Well, I guess you can just read the word and sort of understand, phobic = hating, philic = loving, lipo = something to do with lipids

You can sort of decode other words like that too:
Hyperglycaemia = Hyper - Gly- Aemia
Hyper = High, Gly = Sugar, Aemia = Blood
High Blood Sugar Concentration

[happycat]

How come I was never taught about lipophillic and lipophobic? Perhaps I had a crappy teacher. I openly admit that this is new stuff for me and now I'm a uni student and what an embarassment that is.

Well, I guess you can just read the word and sort of understand, phobic = hating, philic = loving, lipo = something to do with lipids

You can sort of decode other words like that too:
Hyperglycaemia = Hyper - Gly- Aemia
Hyper = High, Gly = Sugar, Aemia = Blood
High Blood Sugar Concentration

I'm very well aware of that but thanx anyway