Lab Report

INTRODUCTION:

 The title of the third experiment is about movement of material through membrane. In this experiment, students ill stud! about the e"e#ts of materials moveme movement nt me#han me#hanism isms s a#ross a#ross membra membrane ne on plant plant #ell #ell and also also for blood blood #ell. #ell.  There are three t!pes of li$uids that have been used for this experiment hi#h is distilled ater, %.&' sodium #hloride and ()' sodium #hloride.

*or plant #ell, if the solution used is distilled ater, it+s #alled isotoni# s olution be#ause the amount of mole#ule of ater move in and di"use out is the same. o the #ell don+t have an! #hanges after the distilled ater as added. If the plant #ell is in a h!potoni# solution hi#h is %.&' sodium #hloride, the #on#entration of ater mole#ule in the external solution is greater than the #ell sap. o, the ater mole#ule ill moves into the #ell b! osmosis. This #an #ause the #ell to be#ome turgid. If the plant #ell is in a h!pertoni# solution hi#h is ()' sodium #hloride, the #on#entration of ater mole#ule in the external solution is less than the #ell sap. o, the ater mole#ule ill di"use out from the #ell b! osmosis. This #an #ause the #ell to be#ome -a##id.

*orr blood, *o blood, if the soluti solution on used used is distil distilled led ater, it+s also also #alled #alled isoton isotoni# i# solution be#ause the amount of mole#ule of ater move in and di"use out is the same. o the #ell also doesn+t have an! #hanges after the distilled ater as added. If the blood #ell is in a h!poto h!potoni# ni# solution solution hi#h hi#h is %.&' %.&' sodium sodium #hloride #hloride,, the #on#entration of ater mole#ule in the external solution is greater than the #ell. o, the the ate aterr mole mole#u #ule le ill ill move moves s into into the the #ell #ell b! osmo osmosi sis, s, in-a in-ati ting ng and and nal nall! l! rupturing the #ell. This #alled #ell l!sis. If the blood #ell is in a h!pertoni# solution hi#h is ()' sodium #hloride, the #on#entration of ater mole#ule in the external solution is less than the #ell. o, the ater mole#ule ill di"use out from the #ell b! osmosis. This #an #ause the #ell to be#ome shrin/ and this #alled #renation.

O012CTI32: •

 To stud! the e"e#ts of material movement me#hanisms a#ross membrane of plant and animal #ell

45T2RI56 5ND 42T7OD:  This experiment as divided into to, 8art 5 for plant #ell 9onion and 8art 0 for animal #ell 9blood. *or 8art 5, materials that used to #ondu#t the experiment ere onion, #ompound mi#ros#ope, slides, #over slips, distilled ater, %.&' and ()' sodium #hloride. *irst step in this part is !ou need to #ut a fe thin purple la!ers of red onion and set it up to ; slides. Then, after put it on a dr! slide, !ou need to observe the #ondition of the onion before three di"eren#es solution as immersed into the slide. 5fter the observation from the mi#ros#ope under ?; drops of solution 9distilled ater, %.&' NaCl, ()' NaCl ere prepared. The solution as dropped on the onion tissue on the slide and then the #over slip as installed. 5fter aiting approximatel! about >?< minutes, the slides as observed under ?< minutes, the slides as observed under