When a person suffers from a marked fall in blood pressure, it is recommended to administer the hormone ..........

Thyroxine

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Adrenaline

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Insulin

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Parathormone

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Solution

The correct option is B Adrenaline
The adrenal medulla secretes adrenaline in response to stress and emergency conditions. This hormone increases alertness, pupillary dilation, sweating, etc. by increasing the heartbeat, strengthening the heart contraction, blood pressure, rate of respiration, etc.
So, the correct answer is option B.

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