Skeletal muscles can be stimulated to contract by a motor neuron very quickly. What makes that possible.Multiple choice question.Muscle cells have a resting membrane potential that is higher than the threshold potential.Muscle cells do not need ACh receptors, their membranes are directly and quickly depolarized by ACh.The nicotinic receptors for ACh on muscle cells become sodium channels and cause rapid depolarization of the membrane.

Complete the sentences by choosing the correct term from each dropdown menu.A muscle cell is stimulated by a that is released from a motor neuron.Ion channels open in the plasma membrane and diffuse into the .The membrane , or becomes less negative.Sodium ion channels close, but channels remain open and loss of that ion the membrane.The process just described is called .

Which neuron directly stimulates skeletal muscle?Multiple choice question.Upper motor neuronLower motor neuron

Fill in the Blank QuestionFill in the blank question.Because skeletal muscles typically are innervated by motor neurons at more than one level of the spinal cord, they are said to exhibit innervation.

The neurotransmitter released at neuromuscular junctions, stimulating skeletal muscle contraction, is .

In the presence of an antagonist that specifically targets the voltage-gated Na+ channels in muscle, an action potential in an alpha motor nerve would result in: