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1) form channels to allow substances to pass through
2) act as receptors
3) act as antigens
4) all of the above

2007-04-15 08:32:57 · 7 answers · asked by FranklyTodd 2 in Science & Mathematics Biology

7 answers

all of the above.

2007-04-15 08:37:34 · answer #1 · answered by SweetNurse 4 · 0 0

4

2007-04-15 08:35:42 · answer #2 · answered by hcbiochem 7 · 0 0

All of the above

2007-04-15 08:37:35 · answer #3 · answered by Thomas L 2 · 0 0

all of the above

2007-04-15 09:48:53 · answer #4 · answered by bananapuddin 1 · 0 0

its definitely 4

2007-04-15 08:51:55 · answer #5 · answered by bigpella3490 1 · 0 0

I think it's 1, but I'm not really sure.

2007-04-15 08:36:00 · answer #6 · answered by calmangel4all 2 · 0 0

They act as receptors.

2007-04-15 09:06:05 · answer #7 · answered by Merry 4 · 0 0

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