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Basal cell

Basal cell

(Science: pathology) general term for relatively undifferentiated cells in an epithelial sheet that give rise to more specialised cells act as stem cells).

in the stratified squamous epithelium of mammalian skin the basal cells of the epidermis (stratum basale) give rise by an unequal division to another basal cell and to cells that progress through the spinous, granular and horny layers, becoming progressively more keratinised, the outermost being shed as squames.

in olfactory mucosa the basal cells give rise to olfactory and sustentacular cells.

in the epithelium of epididymis their function is unclear, but they probably serve as stem cells.

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what is the difference between promoter and enhancer

... which initiates the transcription by unwinding the DNA. Apart from the basal promoter, there are unique upstream promoter sequences which attract ... even though transcription factors are shared among genes within the cell. Enhancer DNA sequences bind transcription factors with special protein ...

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by genetherapy
Wed Mar 14, 2012 4:22 pm
Forum: Molecular Biology
Topic: what is the difference between promoter and enhancer
Replies: 3
Views: 8483

starvation and longer life

... free radicals are caused by all the metabolic reactions that go on in a cell (mitochondria mostly in my opinion). So if you slow down the metabolilc reactions, and a basal metabolism is established (in which there are no deficiencies), then I think that ...

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by kolean
Sat Sep 25, 2010 3:59 pm
Forum: General Discussion
Topic: starvation and longer life
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Re: Caffeine Coursework

... to adenosine, and binds to adenosine receptors on the surface of cells without activating them (an "antagonist" mechanism of action). ... inhibit calcium uptake. A2A receptors are heavily concentrated in the basal ganglia, an area that plays a critical role in behavior control, but ...

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by red.ninja13
Sun Mar 22, 2009 7:39 pm
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Topic: Caffeine Coursework
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Extracellular matrix

The epithelial cells is the outer most surface basal lamina also known as the basement membrane (extracellular matrix) layer Support ... membrane? What are support tissue? Another Question: In animal cells, Cell membrane layer (outer most layer) then the glycocalyx ( middle layer) then ...

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by merge
Sat Mar 08, 2008 12:43 pm
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Topic: Extracellular matrix
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Views: 3695

Cell Glucose uptake !!

Depend on the cell. For example, if it is a plant cell or a bacterial cell it obviously does not need ... main kind of glucose permeases: GLUT1, GLUT2, GLUT3 and GLUT4. GLUT1 accounts for the basal tranport of glucose in all human cells. So no your cell will not starv. Present on ...

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by MrMistery
Mon Oct 22, 2007 8:29 pm
Forum: Cell Biology
Topic: Cell Glucose uptake !!
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