Q. 36 - Biology

Question

What factors contribute to the amount of tension produced in an individual muscle fiber? 

Step-by-Step Solution

Answer

The length of the muscle fibre at rest, its cross-sectional area, and how frequently it is stimulated by the nervous system.

Step : 1 Cross-sectional area

• The cross-sectional area (PCSA) of a muscle, usually at its biggest point, is the area of the cross section of the muscle taken perpendicular to its fibres.
• It is frequently used to define the characteristics of pennate muscles' contraction.

Step : 2 Muscle fibre

• One muscle cell makes up each fibre of muscle. They assist in regulating the bodily forces physically.
• Slow oxidative (SO), fast oxidative (FO), and quick glycolytic are the three different types of muscle fibre (FG).
• Myofibrils are a component of muscle fibres. Actin and myosin filaments make up the myofibrils.