And then Jamie saw it. Not with eyes, but with imagination.
Jamie wasn't looking at a glass of water anymore. The glass was the cell. The water was the outside environment. And inside the glass, the phone's battery icon was a tiny, red, flashing . explanation of active transport
That was it. That was the whole secret.
A tiny, shadowy figure appeared at the wall of the glass. A protein. But not a passive tunnel. This one had arms. It had a grumpy, determined face. It was a pump . And then Jamie saw it
“Correct. But what does that mean ?” explanation of active transport