Ionotropic Receptors on Postsynaptic Membrane

Item #6 of 10

Which of the following statements is true for the alpha-subunit of the postsynaptic membrane.

It is a unit of the G-protein;

It attaches to the ion channel and induces it to open.;

It activates an enzyme used to synthesize second messenger molecules.;

It synthesizes a second messenger molecule;

Alternatives a, b, and c are correct.;

CORRECT - Yes, the alpha-subunit of a G protein may either open an ion channel by its attachment to it or by activating an enzyme that stimulates the synthesis of second messenger molecules.

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		It is a unit of the G-protein;
		It attaches to the ion channel and induces it to open.;
		It activates an enzyme used to synthesize second messenger molecules.;
		It synthesizes a second messenger molecule;
		Alternatives a, b, and c are correct.;