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NEETZoologyLocomotion and Movement

What is the name of the elastic fibre located in the centre of each I-band?

Options

  1. AThin filament
  2. BZ-line
  3. CA-band
  4. DElasticin

Correct answer

B. Z-line

Step-by-step solution

The striated appearance of myofibrils is due to the distribution pattern of two important proteins - Actin and Myosin. The light bands contain actin and the dark bands contain myosin.The light bands in a myofibril contain actin and is called I-band or Isotropic bandThe actin filaments are thinner as compared to the myosin filaments. Hence, they are commonly referred to as thin filaments and thick filaments, respectively.I n the centre of each I-band is an elastic fibre called Z-line which bisects it. The thin filam

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