Not every relation is a function. But every function is a relation. Function is just a part of relation.
The cubic function.
Range
A formula or graph are two ways to describe a math function. How a math function is described depends on the domain of the function or the complexity of the function.
The Mandelbrot graph is generated iteratively and so is a function of a function of a function ... and in that sense it is a composite function.
Bundles of myofilaments make up
A myofibril is a bundle of contractile filaments (myofilaments), 1-2 μm in diameter, that are arranged in parallel groups in the cytoplasm of striated muscle cells.
A muscle fiber contains a sarcolemma, sarcoplasm, myofilaments, and myofibrils. The sarcolemma is the cell membrane that surrounds the muscle fiber, while the sarcoplasm is the cytoplasm of the muscle cell, containing various organelles and substrates for energy production. Myofilaments, which are composed of actin and myosin, are organized into myofibrils that facilitate muscle contraction. Together, these components enable the muscle fiber to function effectively during contraction and relaxation.
The myofilaments in a muscle cell are called actin and myosin. Actin and myosin are protein filaments that work together during muscle contraction to generate force and movement.
Myosin
The A band
I-Band
minimal overlap of thin and thick myofilaments.
the myofilaments themselves do not contract, they slide, this is called the Sliding Filament theory, in which the thick filament (Myosin) slides over the thin filament (Actin).
I Band
Yes.
myofilaments