Finals: Muscle Flashcards
A T-tubule surround what cellular structure at the end of the Z-line in muscle cell
Myofibril
What type of muscle is incapable of regeneration
Cardiac muscle
What morphologic structure lies within the I-band
Z-line
During contraction, calcium binds to what protein
Calmodulin
What type of muscles contain peripherally located nuclei
Skeletal muscle
What connective tissue surrounds a muscle fiber
Endomysium
What functional unit of a skeletal muscle lies between 2 Z lines
Sarcomere
What does a perimysium surround
Fascicle
What is the only filament found at the H band
Myosin
What type of muscle functions as a syncytium
Skeletal muscle
Large, elongated, sausage shaped nuclei are found in this type of muscle
Smooth muscle
Troponin and tropomyosin bind actin until what substance is released from the SR
Calcium
What is the major component of thick filament
Myosin
What structure do actin filament insert in
Z-line
What muscle cell structure is composed of fascia adherens & gap junctions
Intercalated disc
What is the main cell type found in the endomysium
Fibroblast
What structure within the cytoplasm surround the myofibrils at the level of the Z-line
T tubules
Epimysium is composed of what type of tissue
LCT
What structure besides the Z-line contains only actin filaments
I-band
What type of cells is multinucleated
Skeletal muscle
What part of the striations seen in skeletal muscle do the actin and myosin filaments overlap
A-band
What substance anchors thick filaments to the Z disc
Titin
The primary function of the SR is to store & release what substance
Calcium
