Question

A neurophysiology expert is teaching his students the physiology of the neuromuscular junction. While describing the sequence of events that takes place at the neuromuscular junction, he mentions that as the action potential travels down the motor neuron, it produces depolarization of the presynaptic membrane. This results in the opening of voltage-gated calcium channels, which produces an influx of calcium into the endings of the motor neuron. Consequently, the cytosolic concentration of Ca2+ ions increases. Which of the following steps follows immediately, during neuromuscular transmission? Release of Ca2+ ions into the synaptic cleft Binding of Ca2+ ions to NM receptors Increased Na+ and K+ conductance of the motor end plate Ca2+ ions bind to vesicles and exocytosis of acetylcholine into synaptic cleft Generation of an end plate potential

          A neurophysiology expert is teaching his students the physiology of the neuromuscular junction. While describing the sequence of events that takes place at the neuromuscular junction, he mentions that as the action potential travels down the motor neuron, it produces depolarization of the presynaptic membrane. This results in the opening of voltage-gated calcium channels, which produces an influx of calcium into the endings of the motor neuron. Consequently, the cytosolic concentration of Ca2+ ions increases. Which of the following steps follows immediately, during neuromuscular transmission?
Release of Ca2+ ions into the synaptic cleft
Binding of Ca2+ ions to NM receptors
Increased Na+ and K+ conductance of the motor end plate
Ca2+ ions bind to vesicles and exocytosis of acetylcholine into synaptic cleft
Generation of an end plate potential

A neurophysiology expert is teaching his students the physiology of the neuromuscular junction. While describing the sequence of events that takes place at the neuromuscular junction, he mentions that as the action potential travels down the motor neuron, it produces depolarization of the presynaptic membrane. This results in the opening of voltage-gated calcium channels, which produces an influx of calcium into the endings of the motor neuron. Consequently, the cytosolic concentration of Ca2+ ions increases. Which of the following steps follows immediately, during neuromuscular transmission?
Release of Ca2+ ions into the synaptic cleft
Binding of Ca2+ ions to NM receptors
Increased Na+ and K+ conductance of the motor end plate
Ca2+ ions bind to vesicles and exocytosis of acetylcholine into synaptic cleft
Generation of an end plate potential

Added by Dale C.

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