Which of the following would be an example of a receptor that functions in this manner?

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When a particular ligand binds to its receptor, there is an increase in the cleavage of phosphatidylinositol biphosphate into inositol triphosphate and diacylglycerol. Both of these substances have actions within the cell.
1. γ-Aminobutyric acid receptor.
2. Dopamine receptor.
3. Insulin receptor.
4. Muscarinic acetylcholine receptor.
5. Serotonin receptor.

Asked by Jonathan, Last updated: Dec 26, 2024

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John Smith

Answered Sep 09, 2016

Muscarinic acetylcholine receptor-the correct answer is d. the muscarinic acetylcholine receptor, as well as the 1-adrenergic and histamine1 receptors, activates phospholipase c to cleave phosphatidylinositol biphosphate. inositol triphosphate increases calcium ions for use in calmodulin activity, and diacylglycerol (dag) activates protein kinase c. this is done through the gq receptoranswer a is incorrect. the -aminobutyric acid receptor is a neurotransmitter-activated ion-channel-linked receptoranswer b is incorrect. the dopamine1 receptor is a gs receptor and functions to increase adenyl cyclase activity. the dopamine2 receptor is a gi receptor and inhibits adenyl cyclase activityanswer c is incorrect. the insulin receptor is an enzyme-linked receptoranswer e is incorrect. the serotonin receptor, like the -aminobutyric acid receptor, is an ionlinked receptor.