MICROANATOMY

Detailed explanation-1: -A) Actin band is also known as an isotropic band. I-band is the light band and Z-line is present at the centre of each I band. So, it can be said that the Z-line is connected to Isotropic band or I band.

Detailed explanation-2: -Cellular component-Z line The Z line (from the German “Zwischen") largely consists of alpha-actinin homodimers organized in an antiparallel fashion, thereby providing a backbone for the insertions of actin-based thin filaments, as well as titin and nebulin/nebulette.

Detailed explanation-3: -The Z-band (Z-line, Z-disc) defines the boundary of the sarcomere in striated muscle and bisects the I-band of neighbouring sarcomeres (Fig.

Detailed explanation-4: -Actin molecules are bound to the Z-line, which forms the borders of the sarcomere. Other bands appear when the sarcomere is relaxed.