MEDICAL PHYSIOLOGY

Detailed explanation-1: -The striated appearance of skeletal muscle tissue is a result of repeating bands of the proteins actin and myosin that are present along the length of myofibrils.

Detailed explanation-2: -There are two types: the thick bands and the thin bands. Thick bands are made of multiple molecules of a protein called myosin. The thin bands are made of multiple molecules of a protein called actin. The thin actin bands are attached to a Z-line or Z-disk of an elastic protein called titin.

Detailed explanation-3: -the A-bands (anisotropic in polarized light) appear dark in color. The alternating pattern of these bands results in the striated appearance of skeletal. muscle. The Z-lines (Zwischenschieben) bisect the I-bands. A light band called the H-band (Heller) sits within each A-band. The M-line (Mittelschiebe.

Detailed explanation-4: -A-band: The length of a myosin within a sarcomere. M-line: The line at the center of a sarcomere to which myosin bind. Z-line: Neighboring, parallel lines that define a sarcomere. H-band: the area adjacent to the M-line, where myosin is not superimposed by actin.

Detailed explanation-5: -Cardiac muscle (heart muscle) Skeletal muscle (muscle attached to the skeleton)