5 characteristics of muscle - correct answer 1. Responsiveness
2. Conductivity
3. Contractibility
4. Extensibility
5. Elasticity
2 names for muscle fiber - correct answer 1. myofiber
2. myocyte
Muscle cells are packed full of which type of protein filament? - correct answer
myofibrils: bundles of protein filaments (actin and myosin)
Difference between myofiber and myofibril - correct answer Myofiber: a
muscle fiber
Myofibril: protein filaments within the cytoplasm of the muscle cell
Muscle cytoplasm (name and significance) - correct answer Sarcoplasm:
contains glycogen and mitochondria to provide energy for contraction and myoglobin for binding oxygen
Endomysium - correct answer around single muscle fiber; can repair damage
with satellite (stem) cells
Perimysium - correct answer around a fascicle (bundle) of fibers
Epimysium
(connected to? separates?) - correct answer surrounds all the fascicles;
connected to deep fascia; separates muscle from surrounding tissue
What does the epimysium, perimysium, and endomysium make up when they come together? - correct
answer Tendon or aponeurosis
Aponeurosis
(where can it be found?) - correct answer sheet-like structure; found in
palmar and plantar regions
Aponeurosis vs. Tendon - correct answer aponeurosis: sheet-like structure
tendon: cord-like structure
Contractile unit of muscle cell - correct answer Myofibril (actin and myosin)
, What protein is the thin filament? - correct answer action
What protein is the thick filament? - correct answer myosin
What is a cross bridge? - correct answer the heads of myosin filaments
Titin protein (what two regions does it connect in the sarcomere?) - correct answer
a molecular spring which is responsible for the passive electricity of muscle; connects the Z line to the M
line
Z line (sarcomere) - correct answer D
I band (sarcomere) - correct answer C
A band (sarcomere) - correct answer D
H zone (sarcomere) - correct answer E
M line (sarcomere) - correct answer gray arrow (thick line at ends of muscle
cell)
thin filament (sarcomere) - correct answer C
thick filament (sarcomere) - correct answer B
dark band (sarcomere) (also known as?) - correct answer A band
light band (sarcomere) (also known as?) - correct answer I band
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