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what do the ligand gated cation channels do that are located on the sarcolemma? what is...

what do the ligand gated cation channels do that are located on the sarcolemma? what is the motor end plate? what direction do the ions move? (Na and K) how is the resting membrane potential restored?
science   Anatomy-And-Physiology   
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Answer #1

As the action potential travels down the neuron ligand gated channels that are located in sacrolema opens and ca2+ ions flow from the extracellular fluid into presynaptic neuron cytosol. This influx of cations into the cell activates myosin to bind and causes exitation contraction along the muscle and thus muscle contract. But it need ATP and energy continuously.

Motor end plate is contact between motor axons with the Skelton muscle fibers To provide signals.

The 3 Na ions move from outside cell to inside the cell and 2 pottasium Ions move inside the cell

The cells restore membrane potential by using ATP ase work together so that the ions balance across membrane is restored

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