Asked by Monique

The cell membrane is a highly selective barrier that controls the movement of substances in and out of the cell. In fact, polar molecules are unable to go across unless


A. they are enclosed in water-filled vesicles.

B. they pass through channels in the cell membrane.

C. they are broken down into smaller pieces.

D. they react with other substances to become nonpolar.

Answered by Marissia
It's B I Got This Question On Study Island And Listened To This Guy Above And Got It Wrong. Its B
Answered by Anonymous
Marissia is correct. It is B.
Answered by ayan aidid
B. they pass through channels in the cell membrane.
Answered by margret
B
Any one who says different, either
1) doesn't know what they are talking about
or
2)
just want to watch you get it wrong.

If you want to answer a question like this please research before you post so that way other people will get it right.
Thanks! :)
Answered by chris
i got D
Answered by Mel
Water is a polar molecule so it can go through the cell membrane but only by the openings/channels. So the answer is B and I also had this question on Study Island.
Answered by kelci
the answer is D i just had it on study island
Answered by Anonymous
I got B
Answered by Ms. Lisa
The reason people are getting B & D is because Study Island changes answer order. Also, you shouldn't be posting Study Island Question online. You don't know who is giving you the answer, you should ask your teacher to explain if you don't understand.
Answered by OBAMA
ANSWER: they pass through channels in the cell membrane
Answered by Cole
i got c
Answered by Taylor
same i got B i thought my teacher was making up these question... but it turns out he just copied a study island.
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