Question

Arrange the factors which determined the speed mainly:
A. Morphology structure of muscle fibres,
B. Regulating process of nervous system,
C. Muscular strength,
D. Psychic factors

• A. A, B, C, D
• B. D, A, B, C
• C. C, A, B, D
• D. B, D, C, A

Hint:

Understanding these factors can help in designing training programs that focus on both physical conditioning (muscular strength) and mental preparation (psychic factors) to enhance athletic performance.

Answer 1

The Correct Option is D

Step 1: Concept
The speed at which a muscle can contract is influenced by several factors including the morphology and structure of muscle fibers, the regulating process of the nervous system, muscular strength, and psychic factors.

Step 2: Meaning
These factors collectively affect how quickly muscles can generate force and shorten during contraction. Understanding these influences helps in optimizing athletic performance or rehabilitation strategies.

Step 3: Analysis
D (Psychic Factors): These include mental states such as motivation, concentration, and anxiety. They can significantly impact the speed of muscle contraction by affecting the nervous system's regulation. B (Regulating Process of Nervous System): The nervous system controls the recruitment and coordination of motor units, which directly influences how fast muscles contract. C (Muscular Strength): While strength is important for generating force, it does not directly determine the speed of contraction. However, a higher strength level can allow for faster contractions if the neuromuscular control is optimal. A (Morphology Structure of Muscle Fibres): The type and arrangement of muscle fibers (fast-twitch vs slow-twitch) influence contraction speed but are not as directly involved in the immediate regulation of speed compared to nervous system processes or psychic factors.

Step 4: Conclusion
The correct order based on their direct impact on the speed of muscle contraction is D, B, C, A. Psychic factors and nervous system regulation have a more immediate effect on contraction speed than muscular strength or fiber morphology. Final Answer: (D)