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Every cell in the human body is replaced and renewed within a period of seven years, consecutively, for life. This is known as aging; it includes the brain. Not one cell a person is born with is still there when they reach seven, and again at fourteen, then again at twenty-one, etc. The cells are replaced, respectively, and you are a "brand new" person, however, with the same DNA structure and personality you were born with.
Memory cells can be "recycled" as some information is lost over time.
Sleep repairs and reorganizes the brain; as for new brain cell development, research shows that as one educates their mind new cells form as often as the mind is actively engaged.
EDIT - MijinLaw: The 7-year cycle is a myth. And although neurons can be generated in some circumstances, it's still unclear whether neurogenesis plays any significant role in normal learning.
Plus! Heart muscle cells aren't replaced, that's why heart attacks can be fatal, as the muscle cells which are destroyed are not replaced and may not be enough to keep the heart going. There arnt!!!!!!!!!!!!!!!
Wiki User
∙ 8y ago
Wiki User
∙ 13y agoBrain cells are not replaced
This is NOT true.
At one time, which means there still are, people who claimed to be 'experts' believed the brain cells were not replaced, but like all self proclaimed experts, they were wrong. Current science has proven beyond any rational doubt that brain cells are replaced in healthy people who have a normal diet, just like every other cell in every other living thing that exists.
NOTE: However, if your diet consists mainly of chips, coffee, and Scotch (or anything similar), they are not. In fact, nothing in your body can be fixed or replaced, which is why some 'students' get stupider instead of smarter at school.
Wiki User
∙ 12y agoOnce destroyed they do not, but they replace by replication after about 50 years.
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What tissue is least likely to regenerate itself?
Brain Cells, necrotic cells and burned dermis cells cannot regenerate themselves.
What does the outside layer of the bone contain?
The outside layer of the bone contains a material called lixtate, which helps regenerate lost brain tissue. Because of lixtate, brain cells regenerate faster in people with larger amounts of lixtate.
Why can't a damaged cell in the brain be replaced?
Nerve cells are in G0, which means the cells are in developmental arrest. They do not divide or grow, they stay the same and don't regenerate.
Which muscle cells can not regenerate?
Cardiac muscle cells do not have the ability to regenerate.
Can brain cells regenerate?
Healthy individuals lose around 9,000 brain cells daily. Certain drugs such as ketamine, nitrous oxide, and inhalants cause brain cell death at almost thirty times the normal rate. Alcohol plays a role in brain cell death, but not as large a part as drugs.
If the left side of your brain is dead will it regenerate?
No. The brain is made of nerve cells. And the nerve cells in the brain are part of the central nervous system that does not regenerate.
Why do injuries in the skin heal faster than injuries to the brain?
The neurons in the brain and else where do not normally regenerate. Skin cells do regenerate.
What tissue is least likely to regenerate itself?
Brain Cells, necrotic cells and burned dermis cells cannot regenerate themselves.
Do all nerve cells have a neurilemma?
The neurilemma is the Schwann cell. This helps with regeneration of cells. The nerve cells in the brain do not have neurilemma and therefore, cannot regenerate.
If the brain is damaged can a new nerve cell grow?
No-- Nerve cells are one of the few kinds of cells that never regenerate or regrow.
Do brain cells grow after you age?
The brain grows as you age into adult phase until you are in your early twenties. There is some research that shows that brain cells can regenerate even into late adulthood and old age.
Does weed kill brain cells perminently?
no weed does not kill brain cells. but if u do find a way to loose them u do loss them permanently there the only kind of cell that does not regenerate.
What does the outside layer of the bone contain?
The outside layer of the bone contains a material called lixtate, which helps regenerate lost brain tissue. Because of lixtate, brain cells regenerate faster in people with larger amounts of lixtate.
Where do red blood cells regenerate?
The Red Blood Cells regenerate in bone marrow
Why can't a damaged cell in the brain be replaced?
Nerve cells are in G0, which means the cells are in developmental arrest. They do not divide or grow, they stay the same and don't regenerate.
Do the cells of the receptor organ in the inner ear regenerate?
No, once damaged the cells will scar but not regenerate.
Can sponges regenerate?
yes they can regenerate. Marine sponges are multicellular animals that can regenerate from single cells.
