What limits growth in a cell?

Answer 1

With the increase in cell size the ratio between surface area and volume decreases. A large cell will therefore have less surface area compared to the volume to cope with the demands of the cell as far as the exchange of materials between the extracellular environment and the cytoplasm is concerned.On the other hand a smaller cell will have large surface area to adequately meet the demands of the volume of the cytoplasm.The cell volume depends upon r to the power 3 and the cell surface depends upon r(radius) to the power 2. This becomes the limiting factor for the growth of the cell.

Answer 2

What Limits Cell Division

Answer 3

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When a DNA is replicated, it ALMOST makes a double copy of the original except for a tiny, tiny piece at the end. researchers have said that limits the growth of Cell which may cause aging. Another factor is the surrounding, for example the fluids surrounding the Cells. It can also be due to cell signaling, as sometimes they are interfered.

Answer 4

Hi. Great question. I have a different take on the answer. I would like to mention that a a cell is limited by genetics.

By this I mean how many times a single cell can go through mitosis.

I don't know if this is really what you mean by "growth", but at least I can offer a new perspective.

Scientists understand that a cell has a limited number of times it can replicate itself (which is about 40 to 60 times).

They have termed this phenomenon the "Hayflick" limit: I think he is the person who examined this phenomenen closely, and it's named after him.

You should google it, because, even if this is not part of your question, it will definitely start new ones in your head.

Anyway the concept on cell growth limitations goes something like this: (sorry but I don't recall the exact connections between telomerse and telomeres, but i will supply references, so you can learn more):

Telomeric DNA (the tips of chromosomes and often thought of as junk DNA) gets shortened with each round of cell replication.

This is because at the end of every round of chromosomal replication, the polymerase (responsible for genome replication in S phase of cell cycling) gets lost when its in an abundance of TTAGGG (etc) sequence.

Eventually it comes to the end of the molecule and is supposed to slide off (like a passenger carrier on a broken roller coaster ride).

As the polymerase leaves the TTAGGG (etc), some of the sequence is not replicated.

With each cell division, less and less of the telomeric DNA remains.

This sequence is reported to be critical in the cells ability to grow over time.

As the cell divides, and more telomeric DNA is lost, the cell seems less and less inclined to divided.

As mentioned, the doubling time for a single cell seems to be around 40-60 times.

So, other than space limitations (which other people gave you feedback on, and BTW is sort of related to my answer), and Hayflicks limit, there is also the abundance of food, which limits growth.

Answer 5

When you say growth, do you mean division or physical size? The most important thing for actual physical size is the cell type. Different cells need to grow to different sizes. A cell knows what type of cell to be through cell-cell communication. There are two ways cells communicate, cell junctions (physical cell to cell connections) and through extracellular signaling (ligands and receptors). The former is pretty straight forward, the latter is through signaling molecules (like hormones) and receptor proteins outside of cells bound to their membranes.

Basically communication by cells through these 2 mechanisms act to turn on and turn off transcription of genes. And it is the genes that code for proteins that regulate the size of the cells.

Answer 6

the cell divides before it has a chance to grow to big. It divides because if the cell continues to grow, the volume of the cell will grow faster than the outer surface of the cell, so there is too much room in the cell for everything that's inside. This makes transportation inside the cell take longer, and everything is all screwed up.

Answer 7

1. the cell wall is what limits a cell in VEGETALS only
2.in animal cells, its the fact that if the membrane get too big, the cell become fragile...the cell membrane stays the samw width weather the cell is big or not, so if the cell overgrows, the membrane cant hold it and explodes...this is what happens in osmosis. Osmosis is when a cell is placed in pure water...pure water comes inside the cell and the cell blows like a baloon

Answer 8

Cells cannot grow to be really big because as the cell grows, so does the surface area. If a cell's surface area is to large, then it makes transporting nutrients and other things harder across a cell. So the cell can only grow to a certain size because if it gets too large, it can no longer support itself.

Answer 9

the nucleus controls production of organelles, while chromosomal number determines the form and size of the cell

Answer 10

cell wall and how healthy it is determans how much it can expand