Lesson 8 Energy of Muscle Contraction Flashcards
connective tissues that encloses each layer skeletal muscle.
mysia
is the sheath of dense
irregular connective tissue that wraps muscles and allows a muscle to contract and move
powerfully while maintaining the structure.
Epimysium
Muscle fibers are organized into
individual bundles, each called
fascicle
The middle layer of connective tissue is called
perimysium
Inside each fascicle, each muscle fiber is encased in a thin connective tissue layer
of collagen and reticular fibers called
endomysium
is the functional unit of the muscle fiber
Sarcomere
The plasma membrane of muscle fiber
sarcolemma
he specialized smooth endoplasmic reticulum,
which stores, releases and retrieves calcium ions is called
sarcoplasmic reticulum
the thin filament
actin
the thick filament
myosin
after specific binding sites on the actin have been exposed in
response to the interaction between calcium ions (Ca++) and proteins, troponin and
tropomyosin, that “shield” the actin binding sites
sliding filament model
A muscle can return to its original length when relaxed due to a quality of muscle tissue
elasticity
allows muscle tissue to pull on its attachment points and shorten with force.
Contractility
supplies the energy for muscle contraction to take place; provides the energy for the active-transport Ca++ pumps in the SR
ATP
a molecule that can store energy in its phosphate bonds
Creatine phosphate
