Q. 35.0( 3 Votes )

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Answer :

The best example of coordination in our body where both hormonal & nervous control function together can be noticed in the functioning of adrenal glands. The adrenal glands are known as glands of emergency. They have paired structures located on the top of the kidneys. Each adrenal gland has two parts: adrenal cortex & adrenal medulla. Adrenal medulla & sympathetic nervous system function as an integrated system called sympathetic-adrenal system. The adrenal medulla secretes adrenaline & noradrenaline. Adrenaline is secreted at the time of emergency. Adrenaline has a great effect on cardiac activity. Stimulation of sympathetic nerves to adrenal medulla causes large quantities of adrenaline and noradrenaline to be released into the blood circulation. Both the hormones and sympathetic nervous system act on the same organs & produce similar effects on them like accelerates heart beat, raises blood pressure, slows peristalsis, etc. Adrenaline hormone is responsible for " fight or flight response ".


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