Guest guest Posted January 28, 2004 Report Share Posted January 28, 2004 On Tue, 27 Jan 2004 07:16:13 -0000 " mnhijazi_99 " writes: > Dear Friends, > I got the following response from another Yahoo group member ..............snip > > > And what's that supposed to do? Did you know that mammalian cells > are > much more delicate than bacterial cells cause they don't have a cell > wall made of carbohydrates and they are much larger. I am willing to > bet that your cells will be damaged long before any bacteria feel > anything. It is a simple matter of physics and chemistry. " --------------- Unfortunately it probably is not that simple... If one is just considering the structural integrity of bacterial vs. human cells...yes bacteria have strong cell walls, but only sometimes. There are quite often variant forms without the rigid cell walls, and these membrane-only forms can be produced by a number of conditions in the environment of the bacteria, including presence of certain antibiotics and / or chemicals which is extensively documented. (Lida Mattman's book " Cell Wall Deficient Forms " spends an entire chapter on the subject of antibiotic & chemical degradation of the wall). And then, there is the mycoplasma family of bacteria which never have the rigid wall. Also human tissue cells have other structural factors that bacteria do not have, specifically internal cytoskeletal substances including microtubules, actin filaments, and other filaments. These give a cell its shape and structural integrity, assist in its capacity to move, or arrange its internal organelles as necessary. And then, there are other substances outside of cells that give support as well. Then there's the matter of differences in electrical characteristics and response between bacteria and in vivo human tissue. This would be difficult to cover in email. There are numerous differences between bacterial and human cells, including the fact that animal & human cells have more complex & varied lipid molecules in their membranes than bacteria do, some of which play roles in adjustment of electrical field across membranes, electrical insulation, alteration of concentrations of surrounding ion concentration, etc. For an introduction see Alberts et al, Molecular Biology of the Cell (3rd ed), p. 481-485; 521-523; and 22-25, as well as other texts and journal articles. Best wishes, Char ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today! Quote Link to comment Share on other sites More sharing options...
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