The action potential causes the release of calcium 1 pt ions from 0 the cytosol

Question

The action potential causes the release of calcium 1 pt ions from 0 the cytosol the motor end plate O the sarcoplasmic reticulum o the T tubule in the muscle cell. Check Answer What does EMG record? o Contractions of the innervated muscle fibers O Electrical activity of the innervated muscle fibers. o Electrical activity of the motor nerves supplying the 1 pt muscle fibers. Check Answer EMGs may be obtained from needle or surface ipt electrode recordings O True o False é Check Answer which statement regarding evoked EMG is true? o The amplitude of the measured EMG is independent of the number of motor units recruited. O There is synchronous excitation of the muscle fibers innervated by the stimulated nerve. Check Answer Which describes the phenomenon of "coactivation"? 1 pt 0 It is the relaxation of the antagonist muscle during the contraction of the agonist muscle. o It is the simultaneous contraction of other agonist muscles. It is the weaker contraction of the antagonist muscle during the contraction of the agonist muscle. Check Answer

Explanation / Answer

sarcoplasmic reticulum

Electrical activity of the innervated muscle fibres

True

There is synchronis excitation of the muscle fibres innervated by the stimulated nerve

It is the weaker contraction of the antagonist muscle during the contraction of the agonist muscle

All the above

50m/s

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