Biology

HORMONAL CO-ORDINATION

HORMONES AND ENDOCRINE GLANDS Hormones are chemical substances produced or secreted by endocrine glands (ductless glands) in response to various stimuli. Hormones are secreted into the bloodstream and circulated to exert their effect on their target organs.  This effect could be to speed up or slow down biological reactions. A few hormones like thyroxine and […]

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