Well, the cell membrane is full of a bunch of little holes. Sort of like a coffee filter.
What does a coffee filter do? Well, you put the coffee in it and run water through it. Then what?
The water is small enough to pass through the filter and bring some of the coffee with it. But the coffee grains are too big to pass through the filter. If we really wanted the coffee grains to get through the filter, we could force them through. Do you want chunks in your coffee? Eww.
Now the cell membrane is the same way, the little things (water, carbon dioxide, oxygen, sugar) are all small enough to fit through the tiny holes in the cell membrane. This is called, "Passive Transport". Because the things can passively float their way in and out of the cell.
Now some other things are too big to fit through, so to make them fit, the cell has to use energy to open itself a little bit more to let them in. This is called, "Active Transport". Because the cell needs to be active and use energy to let those things in.
<span>Now Osmosis is the transfer of water and salts (basically) throughout the cell.
Both Salt and Water are small enough to fit through the Cell Membrane using "Passive Transport".
I've posted this same response earlier, and it is my writing.</span>
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im gonna go with b it makes more sense to me
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The spinal cord starts at the bottom of the brain system and ends on the lower back as it tapers to form a cone called the conus medullaris.
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The bold part is what you need to know!
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I agree with her.
Explanation:
ATP definitely is the most widely used high energy molecule - especially for cells. But, it is not absolutely necessary for some "passive" cellular mechanics. We can look at passive diffusion of cellular processes which may include; passive diffusion of water, or sugar molecular across a cellular membrane.
I cant see plz zoom in on some questions and ill help
