Many, depends from where the epithelium comes from.
"In many mammals, early embryo cells exchange signals with cells of the uterus. In the human gastrointestinal tract, bacteria exchange signals with each other and with human epithelial and immune system cells." ~ chacha.com
The answer is proteins.
Around 2000 proteins are involved in the regulation of genes in the developing cell in a human body, though there is an estimated 2600 DNA binding proteins, but only around the 2000 is required to account for regulating all the genes in each of our genome during development. its about 10% of the total protein information we have in our genes because the human genome contains information to approx. 25000 proteins.
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Two cell structures that cooperate to produce specific proteins are the endoplasmic reticulum (ER) and the Golgi apparatus. The ER synthesizes and modifies proteins, while the Golgi apparatus processes and packages these proteins into vesicles for secretion outside the cell.
"In many mammals, early embryo cells exchange signals with cells of the uterus. In the human gastrointestinal tract, bacteria exchange signals with each other and with human epithelial and immune system cells." ~ chacha.com
There are estimated to be tens of thousands of different proteins in the human body.
To estimate how many bacterial cells with a diameter of 2 micrometers (µm) can fit into an epithelial cell with a diameter of 40 µm, we can consider the volumes of the cells. The volume of a sphere is given by ( \frac{4}{3} \pi r^3 ). The radius of the bacterial cell is 1 µm, and the radius of the epithelial cell is 20 µm. Calculating the volumes, the epithelial cell can contain about 400 bacterial cells, assuming they can pack perfectly without any wasted space.
The answer is proteins.
The answer is proteins.
The answer is proteins.
.5
there is 3 Epithelial , Muscular, and Nervous
thousands of different proteins
The answer is proteins.
About 5000
Well that depends if you include the membrane of every columnar epithelial cell comprising the lungs.