Question

What is meant by threshold stimulus in muscle contraction? Name any two stimuli other than nerve threshold stimulus.

Answer 1

The minimum strength required for stimuli to initiate the response in a muscle ie contraction is called Threshold stimulus in muscle contraction. No response is seen if the strength of stimulus is below threshold stimulus. The strength of threshold stimuli varies from one muscle fiber to other and also for each type of stimuli. The stimuli other than nerve threshold stimulus are mechanical stimuli like pressure, electrical stimuli like shock, chemical stimuli.