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Title: In this experiment, what is the threshold potential for this motor neuron? Post by: brayleightwrigh on Oct 25, 2017 To contract a single muscle fibre, the same all-or-none response occurs. Then, how is it possible to lift a heavier object? When lifting a heavier weight, more muscle fibres are stimulated. To lift a smaller weight, fewer muscles fibres are stimulated.
In an experiment, the strength of a neural stimulus and the resulting muscle contraction are compared. A single motor neuron that synapses with one muscle fibre is observed in this experiment. One end of the muscle fibre is attached to a mass. If an electrical stimulus is sufficient to cause an impulse in the neuron, the muscle will contract and lift the mass. The following data were obtained from the experiment. Analyze the data, and answer the following questions. Number of Trials Strength of stimulus (mV) Mass lifted by muscle contraction (g) 1 10 0 2 20 0 3 30 20 4 40 Not Tested In this experiment, what is the threshold potential for this motor neuron? What mass can be lifted at 40 mV stimulus? Title: In this experiment, what is the threshold potential for this motor neuron? Post by: bio_man on Oct 25, 2017 Try this link:
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