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GATE 2025 BM – Question 48

Biomechanics · Muscles and Joint Kinematics · 2 marks · Multiple select

Which definitions of muscle testing are correct?

  1. Isotonic: constant tension, measure length
  2. Isotonic: constant length, measure contractile force
  3. Isometric: constant length, measure contractile force
  4. Isometric: constant tension, measure length

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Show answer and explanation

Correct answer: (A) Isotonic: constant tension, measure length; (C) Isometric: constant length, measure contractile force

Explanation

Iso-tonic means constant tension, allowing length to change and be recorded. Iso-metric means constant length, with generated force measured instead. Thus A,C are the correct descriptions; B,D interchange the two tests.

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