cell differentiation會停嗎

2010-05-05 10:33 pm
cell differentiation in human body 會停嗎?

if no, then growth would not stop in human.

回答 (3)

2010-05-06 12:21 am
✔ 最佳答案
Cell differentiation will not stop for a living organism
But the process will only be completed after complete development of a cell.

After the cell died, new stem cells carry out cell differentiation again
and the process is repeated.

From Wikipedia(The free encyclopedia)

http://simple.wikipedia.org/wiki/Cell_differentiation

『Differentiation is a common process in adults as well』

『Adult stem cells divide and create fully-differentiated daughter cells during
tissue repair and during normal cell turnover.』

However, from the question, it is not true that growth would not stop if cell
differentiation will not stop.
Since cells have a constant living period, the grown cells will die and replaced
by new cells.
And the total number of cells are maintained at a constant level in adult.
(EXCEPT mutated cells)

After the puberty period of human, the growth and development stage is
nearly completed.
(Metabolism 代謝作用 is a different idea from growth)

2010-05-06 10:20:19 補充:
thats means after puberty,cell differentiation in human body 會停?

No, Cell differentiation is a repeated process in living human body.
2010-05-06 1:22 am
2010-05-05 10:38 pm
到死果日就會停止. 當年齡越大, 身陳代謝就會慢....


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