sec 2 sci questions

yiha093 SG

Ok, just woke up, now studying, have the following sci question
1) capillaries they allow substances to diffuse through them to?( where?)
(answered)
2)Transpiration, what is it, what isit about, what does it do?
(answered)

3) Visking tube and a beaker of water,( i have glucose in my tube, after a period of time, the glucose diffuse into the water in beaker( does that mean that after a longer period of time, the glucose will go back into the tubing as the concentration is changed to water:high, tubing :low
or does it juz make it equal?

*list wil be updated as i study =D

lpx88 SG

Tissue fluid

wishboy SG

transpiration is the evaporation of water from the aerial parts of plants

lpx88 SG

Glucose diffuse until equal.Thats the concept of diffusion.Diffuse until both areas r equal

missqi SG

the sugar and water molecules will diffuse until both sides have equal concentrations lah.
wah you abit Laughing

yiha093 SG

cher never say how i know, summore, sec 2 nia Mr. Green
u laugh at me later u wrong i tell you Laughing

wishboy SG

Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration until the molecules are EVENLY DISTRIBUTED

yiha093 SG

which 1 conduct electricity
acid or alkaline?
or both?

Darkness_hacker99 SG

both.

Darkness_hacker99 SG

Sugar molecules diffuses

Water molecules enters the visking tubing by Osmosis.

wishboy SG

Acid conduct electricity because of the presence of free moving ions like H+ ions
Alkali conduct electricity because of the presence of free moving ions like OH-

yiha093 SG

darkie can onlione msn now?

Darkness_hacker99 SG

Online liao.

HyuugaNeji SG

water is much smaller than glucose. so water will diffuse in and out first. Dont consider glucose so early. Anyway, since this is a semi permeable membrate, most likely one can pass through, one cannot. Water will flow from high to low concentration until both reach equal concentration. once at equal concentration, water will continue to move in and out at the same time but concentration will still be equal.

Pion SG

Hmm...does fat diffuse out of obese people? Or what diffuses into them? Confused

yiha093 SG

thx
today exam just finished Mr. Green

tanjun SG

depends on the size of membrane. Fat is a very big and complex molecule.