Which type of receptor is involved in rapid responses of muscle cells and neurons?

ligand-gated ion channel

Explanation:

The ligand-gated ion channels are the complexes of transmembrane protein that conduct in the process of flow of ions through the channel pore in response to the process of binding to the neurotransmitter. These ion channels bind to the neurotransmitters and they also open in response to the ligand binding. These channels performs the role in controlling the synaptic transmission between the two neurons and also in between the a neuron and a muscle cell.    

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explanation:

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?