The force of muscle contraction can be increased by all of the following except :
C i.e. Increasing the amplitude of action potential in the motor neurons.Action potential follows an all or none law. If sufficient amplitude is reached to produces a response, increasing the amplitude fuher will not have any effect on the function to follow.Factors res onsible for gradingof muscular activityNumber of motor unitsWith minimal voluntary activity only a few motor units discharge. With increasing voluntary(Recruitment)effect more and more units are brought into play - 'Recruitment phenomenon'. With increasing motor units, force of muscle contraction increasesFrequency of ContractionFrequency of discharge in the individual fibre play a role. Tension developed during a tetanic(Summation)contraction (with rapidly repeated stimulation) is greater than during individual twitchesLarge motor unitsForce of contraction depends on length of muscle - starling's law
Increasing the frequency of activation of motor units
Increasing the number of motor units activated
Increasing the amplitude of action potentials in the motor neurons
Recruiting larger motor units
Increasing the amplitude of action potentials in the motor neurons