Right? Sooo then, how often do we have a totally new nose? And how often do our bone and cartilage cells replace each other? And do the cells ever change what they are replacing? Instead of copying exactly what the DNA says to, do they ever do something else? And what power does the brain/mind have over the cells?
2007-10-04 07:06:33 · 5 answers · asked by soccer_girl 1 in Science & Mathematics ➔ Biology
Well,dependin on how often u wanna visit the plastic surgeon, to answer ur 1st Q. other than that u probably already know that along with our feet our noses continue to grow until we die. Our bone and cartilage do replenish. this deteriorates with age though, Sorry not up to speed with DNA, but of course our cells replace and change,guessin u'v seen scar tissue. Pretty simplistic to to equate the brain havin power over all cells. they are an entity to themselves, but at the same time work as a united front... Get yourself an anatomy&physiology book if your keen to understand it all.
2007-10-04 07:35:55 · answer #1 · answered by enigma 3 · 0⤊ 0⤋
Some cells only live a very short time (lining of intestine, red blood cells) and some cells are yours for life (nerve cells). Of course there are mistakes in the DNA sometimes, especially if the cells are exposed to radiation, ultraviolet light, or cancer-causing chemicals. These cells aren't going to start making muscle cells instead of skin cells or blood cells instead of bone cells. Cell division is controlled by the nucleus and paced by the enzymes. The brain doesn't control cell division.
2007-10-04 07:27:06 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋
Our cells, mutually as they're concern-unfastened copies of previous variations, are no longer precisely a similar. in spite of the fact that in the event that they're ninety 9.999999% same, ultimately that huge type will replace. in the event that they mirror a million million cases in a life-time, then that makes them in straightforward terms 36.7% same to the unique cells. With those adjustments, mutations, comes sickness. previous cells age us. interior a cellular, telomeres on the top of each and every chromosome incorporate genetic information that gets clipped away with each and each cellular branch. on the beginning up, telomeres are long adequate that they are able to handle a snip right here and a trim there. yet as quickly as they hit a definite length, the information is lost.
2016-10-10 07:33:55 · answer #3 · answered by ? 4 · 0⤊ 0⤋
I think bones take about 5 years to replace themselves
2007-10-04 07:30:36 · answer #4 · answered by rosie recipe 7 · 0⤊ 0⤋
Most probably months weeks or years. Cells dye off everyday but hey i no sciience expert
2007-10-04 07:14:06 · answer #5 · answered by Clueless =] 3 · 0⤊ 0⤋