muscle contraction

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Thân thiện
muscle contraction

The athlete's muscle contraction is visible as he lifts the heavy weight.

Definition

Noun: 1. A physiological process: In physiology, a "muscle contraction" is the activation of tension-generating sites within muscle fibers, resulting in a shortening or tensing of a muscle or muscle fiber. It is the fundamental mechanism by which muscles produce force and cause movement.

Usage
  • The term "muscle contraction" is a standard, formal noun used in biological, medical, and fitness contexts to describe the specific physiological event.
  • It can refer to both voluntary actions (like lifting a weight) and involuntary actions (like a heartbeat or a reflex).
Examples
  • Noun:
    • The bicep curl exercise involves a concentric muscle contraction to lift the weight.
    • A cramp is a painful, involuntary muscle contraction.
    • Calcium ions are essential for initiating a muscle contraction.
Advanced Usage
  • "To induce/trigger a muscle contraction": To cause a muscle to contract, often through neural stimulation.
    • The electrical impulse from the nerve induces a muscle contraction.
  • "Sustained/prolonged muscle contraction": A contraction that lasts for an extended period.
    • Tetany is characterized by sustained muscle contractions.
Variants and Related Words
  • Contraction (n): The more general term for the act of becoming smaller or tighter. In specific contexts, it is synonymous with "muscle contraction."
  • Muscular contraction (n): A less common but synonymous variant.
  • Twitch (n): A brief, small muscle contraction.
  • Spasm (n): A sudden, involuntary, and often painful muscle contraction.
Synonyms
  • Shortening (n): Emphasizes the reduction in length.
  • Tensing (n): Emphasizes the increase in tension.
  • Flexion (n): Specifically refers to a contraction that decreases the angle at a joint (e.g., bending the elbow).
Related Concepts (Not Phrasal Verbs or Idioms)
  • Isometric contraction: A muscle contraction where the muscle generates force without changing length (e.g., pushing against a wall).
  • Isotonic contraction: A muscle contraction where the muscle changes length while moving a constant load (e.g., lifting a dumbbell).
  • Concentric contraction: A type of isotonic contraction where the muscle shortens.
  • Eccentric contraction: A type of isotonic contraction where the muscle lengthens under tension.
muscle contraction

The athlete's muscle contraction is visible as he lifts the heavy weight.

Noun
  1. (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)

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