Question

Choose the incorrect statement

Answer 1

The incorrect statement is: The motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials.

The motor end plate membrane generates threshold potential-"All or None" potential.  After the release of acetylcholine from the presynaptic neuron, it diffuses across the neuromuscular junction and binds to its receptors on the muscle fiber. As a result conductance of sodium and potassium is increased which results in depolarization of the muscle cell membrane. This is called a miniature end-plate potential (MEPP) which is additive meaning that it leads to a greater depolarization of the postsynaptic membrane and become end plate potentials (EPPs).