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Question : What is statement?

Answer»

Part between two H-lines
Part between two A-lines
Part between two I-bonds
Part between two Z-lines

Solution :HUXLEY REPORTED the fine structure fo strated musclen fibre or MYOFIBRIL. Each myofibril is make up of A-bands (dark band anisotropic) and I-bands= isotropic (light bands isotropic). These two bands are made up of myosin and actin filament respectively. Each I-band is divided into two equal HALVES by a thin, fibrous and transverse zig-zag PARTITION, called Z-band or Z-disc or Krause's membrane.
The part of the myofibril between two successive Z-lines founctions as a contractile unit called sarcomere.


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