Each of these muscles can laterally flex the vertebral column,except thea. external oblique.b. transversus abdominis.c. spinalis.d. internal oblique
Each of these muscles can laterally flex the vertebral column,
except the
a. external oblique.
b. transversus abdominis.
c. spinalis.
d. internal oblique
The filaments of myofibrils are known as myofilaments. These are principally composed of proteins known as myosin and actin. Different muscles have different arrangements of the myofilaments. The muscle groups are striated, obliquely striated muscle and smooth muscles. There are majorly three types of myofilaments. These are thick, thin, and elastic. These are described as follows:
The thick filaments are mainly composed of the myosin protein and it has a diameter of about 15 nm.
The thin filament is composed of mainly the actin protein and has a diameter of about 7 nm. The actin is mainly fibrous actin. The fibrous actin is in turn composed of globular actin protein.
Elastin filaments are mainly composed of the protein known as the titin protein. It has a diameter of about 1 nm. It aids in preventing the thick filaments from overstretching by recoiling like a spring whenever the muscles are stretched.
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