Frog heart questions 1 what will happen to the force of cont

Frog heart questions:
1. what will happen to the force of contraction when the stimulus strength is increased?

2. Compare the force of muscle contraction between a single twitch and the complete tetanus.

3. Describe the muscle fatigue phenomenon in the frog gastrocnemius muscle.

4. Describe the results of Length-Tension relationship during the isometric contraction

Solution

Ques-1. what will happen to the force of contraction when the stimulus strength is increased?

Answer: The effect of increasing voltage on isolated skeletal muscle is going to produce “increased active force & attained plateau” after that there was no increase in active force even upon maximum voltage applied. The force of contraction increases when the stimulus strength is increased because as the amplitude of stimulus voltage increases onto the muscle cells, the action potential amplitude also increases. This is because the stimulus voltage necessary to bring a threshold action potential is to be attained to initiate an action potential.

2. Compare the force of muscle contraction between a single twitch and the complete tetanus.

Answer: The force of muscle contraction of single twitch is lower compared to the complete tetanus because during tetanus, summation of multiple motor units are going to occur at the time of strong stimulus interaction with muscle units whereas the force of contraction is lower with a single twitch muscle because of lower force of contraction