Signal binds - PowerPoint PPT Presentation

Ch 45: Hormones and Endocrine System

Ch 45: Hormones and Endocrine System. Essential Knowledge. 2.e.2 – Timing and coordination of physiological events are regulated by multiple mechanisms (11.1). 3.b.2 – A variety of intercellular and intracellular signal transmissions mediate gene expression (11.1 &amp; 11.4).

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SIGNALLING MOLECULES Hormones

SIGNALLING MOLECULES Hormones. Signal= Ligand. Signaling Molecules. The endocrine and nervous system transmit messages by releasing signaling molecules that act by attaching to specific receptors . (enzyme-like protein molecules) in the membranes of target cells .

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Getting the Message

Getting the Message. Signals &amp; their transduction. Signalling Molecules.

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