i. The usage of iodised salt is advised as the ingestion of iodine prevents the deficiency of iodine in our bodies.

Iodine is essential for the development of our brain, even then having less amount of iodised salt, as well as more amount of iodised salt, can be dangerous for our health.

So it has to be made sure that we intake the right amount of iodine in the form of iodised salt in our meals.

ii. The central nervous systemorthe CNScontainsthebrain andthespinal cord.

Everything else butthe CNSit is known asthe peripheral nervous system.

The peripheral nervous systemor PNS containsthe nerves, which leavethebrain andthespinal cord and travel to certain areasof thebody.

i. Adrenalineis ahormonesecreted by adrenal medulla during stress.

This is called asemergency hormonebecause it initiates quick reation which makes the individual to think and respond quickly to the stress.

The hormoneincreases metabolic rate. there occurs dialation of blood vessels going to heart and the brain.

ii. Thenervousandendocrine systemsboth work to bring about this adaptation, but their response patterns aredifferent.

Thenervous systemand theendocrine systemuse chemical messengers to signal cells, but the speed at which these messages are transmitted and the length of their effects differs.

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