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PSL201 – Feb 14 – Endocrine 1 Introduction to Hormones.docx

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Department
Physiology
Course
PSL201Y1
Professor
Michelle French
Semester
Winter

Description
PSL201Feb 14Endocrine 1 Introduction to HormonesMechanisms of Intercellular Communicationall body functions require communication between cellsthere are only a few mechanisms in the body for cells to communicate with one anotherfew instances linked by gap junctionsmost instances communicate through chemical messengersDirect Communication Through Gap Junctiongap junctions link adjacent cells o formed by connexins plasma membrane proteins o form channels that allow molecules to pass throughmetabolically couples cells so that one cell can provide for anotherIndirect Communication Through Chemical Messengerschemical messengerligand molecules that bind to proteins reversiblyhundreds of chemical messengers with different functionsone cell releases a chemical into the interstitial fluid secretionanother cell target cell responds to the chemical messenger bc of itsreceptors which specifically recognize the ligand o this binding produces a response in the target cell thro
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