Muscle Tissue Flashcards
What is the other term used for “smooth muscles” due to their typical organ distribution?
Visceral Muscle
Term used to refer to the cytoplasm of muscle fibers/muscle cells.
Sarcoplasm
What is the special feature unique for cardiac muscles that acts as junctions that functions the same between epithelial cells?
Intercalated discs
Thin but dense connective tissue that wraps fascicles.
Perimysium
Cells branch, are striated, are uninucleate. Have a intercalated discs.
[muscle tissue types]
Cardiac muscle
Cells run the full length of a muscle. The striations are characteristics of this muscle type. These cells are multinucleated.
[muscle tissue types]
Skeletal muscle
Cells are spindle shaped and uninucleate (center of the cell).
[muscle tissue types]
Smooth muscle
Only muscle tissue type that is non-striated.
[muscle tissue types]
Smooth muscle
[3] Muscle fibers arranged in groups.
- Epimysium
- Perimysium
- Endomysium
enclose the entire (dense irregular)
[muscle fibers]
Epimysium
surrounds the individual fascicle.
[muscle fibers]
Perimysium
individually wrapped the muscle fiber.
[muscle fibers]
Endomysium
Anisotropic band
Dark A Band
Isotropic band
Light I Band
a threadlike structures.
Myofilaments
are composed of the protein myosin.
[myofilaments]
Thick filaments
Each myosin molecule has a rod like tail and two globular heads.
[myofilaments]
Thick filaments
Filaments are chiefly composed of the protein actin.
[myofilaments]
Thin filaments
Tropomyosin and troponin are regulatory subunits bound to actin.
[myofilaments]
Think filaments
[2] regulatory protein in thin filaments.
1.Tropomyosin
2. Troponin
It is a thick dense connective tissue that surrounds the entire skeletal muscle.
Epimysium
Bundle of skeletal muscle that is surrounded by perimysium.
Fascicle
Elongated, multinuclear cells composed of several myofibrils.
Muscle fiber
Delicate connective tissue that surrounds muscle fiber.
Endomysium
Long, cylindrical filament bundles in the sarcoplasm of myocytes.
Myofibril
