CBSE 2025 · Region 4 · Set 1 · Q30 · 3 marks
State two limitations of electrical impulses in multicellular organisms. Why is chemical communication better than electrical impulses as a means of communication between cells in multicellular organisms?
Marking-scheme solution
Limitations of electrical impulse:
They reach only those cells that are connected by nervous tissue, and not every cell in the animal body.
Once an electrical impulse is generated in a cell and transmitted, the cell will take some time to reset its mechanism before it can generate and transmit a new impulse. / Takes sometime to reset its mechanism.
In chemical communication the signals (chemical compound) potentially reach all cells of the body steadily and persistently providing the desired changes.
Control and CoordinationNervous System and Reflex ActionUnderstandshort_answermedium
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.