Why is it that muscarinic ACh receptors can depolarize some cells and hyperpolarize others? OThere are different muscarinic ACh receptor subtypes - they are ionotropic receptors and activate different signaling pathways. There are different muscarinic ACh receptor subtypes - they are ionotropic receptors and open different ion channels. There are different muscarinic ACh receptor subtypes - they are metabotropic receptors and activate different signaling pathways. There are different muscarinic ACh receptor subtypes - they are metabotropic receptors and open different ion channels. None of the above - muscarinic ACh receptors can only depolarize cells

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