(a) Why is the use of iodised salt advisable? Name the disease caused due to deficiency of iodine in our diet and state its one symptom.
(b) How do nerve impulses travel in the body? Explain.
(a)
(b) A nerve impulse forces from the denture to the cell body and then along the axen to the nerve ending. In the end, enemies are released which fill the gap of the synapse (synapse is the gap between two nerve cells).
Impulse pass synapse to reach the next nerve cell and impulse further travel in the body.