The GATE Grind

GATE 2022 BM – Question 23

Biomechanics · Muscles and Joint Kinematics · 1 mark · Multiple choice

A skeletal muscle is recruited to lift a load, but the force generated by contraction is insufficient to lift it. What type of contraction is described?

  1. Isometric
  2. Isotonic
  3. Isokinetic
  4. Isoinertial

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Show answer and explanation

Correct answer: (A) Isometric

Explanation

In the stated situation the load does not move and muscle length remains essentially fixed while tension develops. This is isometric contraction, A. Isotonic contraction entails shortening or lengthening against an approximately constant load; isokinetic denotes constant movement speed.

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