What does ionotropic & metabotropic mean? - ProProfs Discuss
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What does ionotropic & metabotropic mean?

Asked by ALSTAN on Nov 08, 2017

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Janelle Powers

Janelle Powers

Answered on Feb 09, 2018

Ionotropic receptors are transmembrane molecules that can open or close a channel that would allow smaller particles to come in or out of a cell. The name gives this clue, but an “ionotropic” receptor allows ions to travel in and out. They are not always open; they are usually closed until a ligand or neurotransmitter binds to the receptor.

Metabotropic receptors do not open or close. They are instead linked to a small chemical called a “G-protein.” As soon as a ligand bind to this kind of receptor, it activates the G-protein, which then activates another molecule. That next molecule is called a “secondary messenger.”

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ALSTAN

ALSTAN

Answered on Nov 09, 2017

What is the definition of ionotropic &what is the definition of metabotropic?

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