Question

Match the following and select the correct option.

Column – I Column – ll

A. Fast muscle fibers (i) Myoglobin

B. Slow muscle fibers (ii) Lactic acid

C. Actin filament (iii) Contractile unit

D. Sarcomere (iv) l-band

• A. A-(i) B-(ii), C-(iv), D-(iii)
• B. A-(ii), B-(i), C-(iii), D-(iv)
• C. A-(ii), B-(i), C-(iv), D-(iii)
• D. A-(iii), B-(ii), C-(iv), D-(i)

Answer 1

The correct option is C

A-(ii), B-(i), C-(iv), D-(iii)

A-(ii), B-(i), C-(iv), D-(iii) is the solution.
Slow twitch muscles have slow contractions and a high resistance to fatigue. Structurally, they have a small motor neuron and fiber diameter, a high mitochondrial and capillary density, and a high myoglobin content. Fast-twitch muscle fibers tend to produce more lactic acid than other fibers.
Actin filaments, the thin filaments, are the major component of the I-band and extend into the A-band.
Skeletal muscles are composed of striated subunits called sarcomeres, which are composed. The functional contractile unit of the myofibril of a striated muscle.