Question 21 What is it called when action potentials come so...

Question 21 What is it called when action potentials come so fast (10-20 stimuli/second) that the muscle fiber has time to relax between them, but there is not enough time to completely reabsorb all of the calcium, causing each twitch to be stronger than the previous? Treppe Incomplete tetanus Tetanus Twitch

Transcript

00:01 The question says that what if a skeletal muscle is been stimulated by a closely timed but separate stimuli? means skeletal muscle is going to be sent with an impulse or a stimuli at a short short intervals.

00:26 So what is the result which could be seen? how it is going to be react when it has been stimulated by the series of closely time but separate stimuli.

00:37 And the options given are option 1 or option a says that the white fiber will respond.

00:47 White fiber are where there are less number of mitochondria and myoglobin.

00:52 And these white fibers generally will respond when there is a heavy.

00:59 Work or when there is a fast work for short period of time.

01:06 So in a short period when you're going to do some heavy work or a fast work that time white fiber is going to respond.

01:14 And generally they will do anaerobic respiration.

01:18 Okay, they will do generally an aerobic respiration.

01:22 So therefore this is not the condition or this is not the answer we are looking for because the stimuli is being continuously provided.

01:32 So white fiber is not our correct answer.

01:36 Let's move further option b.

01:38 Option b says there could be a twitch.

01:41 Now what is twitch? twitch is a simple or a short timed contraction and relaxation of a muscle.

01:52 So one cycle of a contraction and a relaxation could be called as a twitch.

01:58 So if if there was only one stimuli then at which was possible but since there is a timed stimuli and which has been given continuously with a particular period of time this cannot be possible.

02:12 This is not our answer.

02:14 Then moving to the third option, there could be a sustained muscle contraction...

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