this post was submitted on 09 Oct 2025
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Definitely wrong, although I do not have a collegiate off-hand understanding of biology to really fully decribe it.
But it comes down to what does a "cell" mean in biology? Even your case in point specifies an object with many cells in it.
Cell membranes don't use simple diffusion to transport chemicals across. That's the entire point of a "cell". It's a defined region that at least attempts to control its own various chemical balances. Cells do have many gates that allow many molecules across, unfortunately including many viruses and prions. Unfortuntely, cell walls are also not impervious to truly toxic chemicals, either, so a "cell wall" still can absolutely break down with minimal effort with the right chemicals. They do attempt to control their own balances though, including basic ionic content. That's the whole point. The attempt.
I really have to ask... Why do you think humans aren't so big on the scale of life? Your perspective really come across as human-centric. Not "bad" by itself, but still wholly incompatible with reality.
The thing that does change in relation to diffusion at scale is the necessity of circulatory and respertory systems, which is a massive order of magnitude or few increase in complexity than cells.
Well, from reading this its pretty clear to me now that you don't know much about biology. And yet you have really strong opinions on something you have no education in.
What are you even trying to say here?
They do for quite a lot things actually. Simple diffusion, facilitated diffusion, and active transport all take place and are all necessary for the cell to function. The ratio of cytoplasm volume to cell membrane area is relevant regardless.
By the way, you didn't need to write an entire paragraph about homeostasis or try to define what a cell is.
Your perspective really comes across like you're high on something. You also apparently didn't understand what my comment was even about. It was about this sentence:
I wasn't assuming anything. In saying "correct me if I'm wrong" I was being charitable in leaving the door open that you might know something relevant about cellular scale that I didn't. But I'm pretty confident now that is not the case.