Which of the following statement is correct? (a) A motor...

Name: Problem 61, Chapter 20: Objective Biology for NEET
Uploaded: 2021-10-19T12:39:17-08:00
Duration: 2 min 38 s
Channel: Qudsiya Anis
Description: Which of the following statement is correct? (a) A motor neuron along with the muscles fibres connected to it constitute a motor unit. (b) The reaction time of the fibres can vary in different muscles. (c) Muscle fatigue is due to lactic acid formation due to anaerobic respiration. (d) All the above

Which of the following statement is correct? (a) A motor neuron along with the muscles fibres connected to it constitute a motor unit. (b) The reaction time of the fibres can vary in different muscles. (c) Muscle fatigue is due to lactic acid formation due to anaerobic respiration. (d) All the above

Which of the following statement is correct?
(a) A motor neuron along with the muscles fibres connected to it constitute a motor unit.
(b) The reaction time of the fibres can vary in different muscles.
(c) Muscle fatigue is due to lactic acid formation due to anaerobic respiration.
(d) All the above

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Key Concepts

Muscle Fatigue and Lactic Acid Formation

Muscle fatigue is a phenomenon observed during prolonged or intense activity, where the muscle's ability to generate force diminishes. One contributing factor is the accumulation of lactic acid from anaerobic respiration, which reflects a shift in energy production pathways under conditions of high demand that exceed the oxygen supply.

Muscle Reaction Time Variability

Muscle reaction time refers to the period between the application of a stimulus and the onset of the muscle contraction. This time can vary across different muscles due to differences in fiber types, the number of motor units, and the neural control mechanisms, influencing how quickly and effectively various muscles respond.

Motor Unit

A motor unit is a fundamental concept in neuromuscular physiology, where it is recognized as comprising a single motor neuron and all the muscle fibers it innervates. This unit acts in concert to produce muscle contraction, and its size and recruitment determine the force and precision of the contraction.

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