Question

Stimulus several times greater than the threshold stimulus is provided to muscle fibre, it will
a. Contract with same force
b. Contract forcefully
c. Contract slightly
d. Undergoes tetany

Answer 1

A biological principle that relates reaction to stimulus in impulsive tissues. It was first recognized for the shrinkage of heart muscle by the American physiologist Henry P. Bowditch in 1871. It has been established, though, that the discrete fibers of both skeletal muscle and nerve answer to stimulation according to the all-or-none law.

Complete answer:
The all-or-none law is a code that states that the power of a response of a nerve cell or muscle fiber is independent upon the strength of the provocation.

The extent of response, though, is not dependent on the strength of the stimulus, provided this is tolerable. The useful response is alike in these special tissues—heart, skeletal muscle, and nerve. The retort looks like a fiery reaction in that it depletes for a time the accessible store of energy on which it depends.

Therefore, stimulus numerous times greater than the threshold stimulus is given to muscle fiber, it will shrink with the same force due to all or none phenomenon.

Hence, the correct answer is option (A).

Note: The relation of response to a stimulus is that if a stimulation shock forms a contraction or fails to do so according to its strength; if it does so at all, it produces the highest contraction that can be created by any strength of stimulus in the state of the muscle at the time. It was supposed that this law was unusual to the heart and that the other extremely specialized and quickly responding tissues—skeletal muscle and nerve—reacted diversely, the force of response being graded according to the strength of the stimulus.