Question

Which of the following is most likely to move through the cell membrane by facilitated diffusion? A. Small lipids, B. 02, C. C02, C. Na+

Answer 1

Think about it, a cell membrane is non-polar which means that polar molecules or charged particles (ions) will not be able to go through without a channel. Likewise, small non-polar molecules will be able to diffuse without a channel - straight through the membrane.

Note: Facilitated = no energy required; moves along concentration gradient

Answer 2

and then?

Answer 3

u take too long

Answer 4

So work by process of elimination to get to the correct answer.

Answer 5

i elmnated C. Na+ am i right?

Answer 6

because Na+ It needs energy

Answer 7

I also eliminated Small lipids

Answer 8

hm not quite. the answer is small lipids

Answer 9

No is not the answer

Answer 10

small lipids is not the answer

Answer 11

This is becuse \(O_2\) and \(CO_2\) are very small molecules

Answer 12

it should be

Answer 13

i was doing online homework and it said is not small lipids

Answer 14

I tried its not

Answer 15

it has to be o2 or c02

Answer 16

I tried its not

Answer 17

Nope, it's not those. It really should be small lipids. I googled and the answer given was \(Na^+\).

Answer 18

it has to be o2 or c02

Answer 19

please stop using zero "0" for oxygen "O"

Answer 20

ok sorry

Answer 21

no problem. So, i'm pretty sure its \(Na^+\) -while it may not make sense in the influx of it - it certainly is used in the out flux for action potentials.

Answer 22

yap your right this one

Answer 23

it said it is right

Answer 24

it is correct thanks

Answer 25

What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane?

Answer 26

A. Simple diffusion is passive but facilitated diffusion is an active process that uses energy.

Answer 27

B. Simple diffusion requires molecules to move through special doorways in the cell membrane.

Answer 28

C. In simple diffusion, molecules move down the concentration gradient but in facilitated diffusion molecules move up the concentration gradient.

Answer 29

C. In simple diffusion, molecules move down the concentration gradient but in facilitated diffusion molecules move up the concentration gradient.

Answer 30

D. In facilitated diffusion, molecules only move with the aid of a protein in the membrane.

Answer 31

D. In facilitated diffusion, molecules only move with the aid of a protein in the membrane.