Asked by sonaisha | 21st Jan, 2009, 08:36: PM
i) Nerve impulses will reach only those cells that are connected by nervous tissue, not each and every cell in the 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 a new impulse. So cells cannot continually create and transmit electrical impulses.
Our body can overcome this by using another means of communication between cells in addition to electrical impulses, i.e. chemical communication. Chemical coordination is achieved through hormones.
Answered by | 22nd Jan, 2009, 09:06: AM
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