Though electrical impulses are an excellent means of quick transfer of information in animals there are certain limitations to the use
of such impulses. List such two limitations. State the other means of communication used by most multicellular organisms between
the cells.
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(i) They reach only those cells that are connected by nervous tissue and not each and every cell in the
animal body.
(ii) Once an electrical impulse is generated in a cell and transmitted, the cell will take some time to reset its
mechanisms before it can generate and transmit electrical impulse.
Other means of communication is chemical communication or chemical co-ordination by compounds called hormones.
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