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Identify the structure 'x'.

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MCQs on endocrine glands and hormones, human endocrine system, hormone action mechanism, heart, kidney and gastrointestinal hormones.


Identify the structure 'x'.<br><img src='https://www.fatskills.com/images2/biology-questions-answers-chemical-control-coordination-mechanism-hormone-action-q9.png' alt='Hormone-receptor complex diagram' width='861' height='306' class='303017' />






 
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