Question

15. With the help of labelled diagram explain the general scheme to illustrate how
nervous impulses travel in the body? (5)​

Answer 1

Answer:

THE ANSWER IS EXPLAINED WITH DIAGRAM:-

Explanation:

--->> When the impulse is generated due to external stimuli, it travels through several neurons. At first, it to dendrites of the neuron where the electric impulse is goes to cell body from the dendrites. Next, it passes to the Axons of the neuron and then lastly to the Axonal end.

The impulse is released out of the neuron and goes to the other neuron passing to a fluid medium called Synapse.

By this Impulse travels through several neurons and take the message to the Brain.

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Answer 2



The information from the environment is detected by receptors and passed on to the dendrite of the sensory neuron, from where the electrical signals are passed on to the cyton then to axon and finally to the presynaptic knob which releases neurotransmitters which goes to the synaptic cleft and generates an electric response on to the dendrite of the next neuron and ultimately to brain (or spinal cord). The response from brain (or spinal cord) is similarly passed on to the effector, that undergoes the desired response.