When you bend your arm at the elbow to hold a bag, what happens to the biceps and triceps muscles on your…

When you bend your arm at the elbow to hold a bag, what happens to the biceps and triceps muscles on your upper arm?
  1. Biceps contract and triceps relax
  2. Biceps relax and triceps contract
  3. Both biceps and triceps contract together
  4. Both biceps and triceps relax together

Solution

Muscles work in opposing pairs: bending the elbow requires the biceps (front) to contract and shorten, while the triceps (back) relaxes.

Asked in: Homi Bhabha Practice

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