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Advances in Comparative and Environmental Physiology - Comparative Aspects of Mechanoreceptor Systems (Paperback, Softcover reprint of the original 1st ed. 1992)
Loot Price: R2,809
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Advances in Comparative and Environmental Physiology - Comparative Aspects of Mechanoreceptor Systems (Paperback, Softcover reprint of the original 1st ed. 1992)
Series: Advances in Comparative and Environmental Physiology, 10
Expected to ship within 10 - 15 working days
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In the past 5 years there has been an enormous increase of evidence
that the ion channels activated by mechanical force are common to a
wide variety of cell types. Mechanosensitive (MS) ion channels form
a small proportion of the total channel population. They are now
found in more than 30 cell types from E. coli, yeast, to plant,
invertebrate, and vertebrate cells, where they occur in virtually
all types of cells from bone to smooth muscle, as well as neurons.
The majority of MS channels are permeable to monovalent cations and
are slightly selective for K+ over Na +. How 2 ever, there are
several reports of anion-selective MS channels, MS Ca + channels,
and MS channels with large conductances that do not dis criminate
markedly between cations and anions. Recently B. Hille has
postulated possible evolutionary relationships between several
types of ion channels, with mechanosensitive channels predating
even the eukaryotes. Two voltage-gated channel types originate with
the stem eukaryotes, as deduced from the presence of voltage-gated
K+ 2 and Ca + channels in protozoa, algae, or higher plants.
Agonist-gated chan nels as well as voltage-gated Na + channels
appear with the earliest metazoan animals, as deduced from the
presence of Na + spikes and fast chemical synapses in cnidaria
(coelenterates), ctenophores, and all higher animals.
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