MUSCLE TISSUE Flashcards
a specialized tissue
responsible for movement in the body.
muscle tissue
The building blocks of muscle
contraction:
MYOFIBRILS
SARCOMERES
MYOFILAMENTS
The basic contractile
units of muscle cells.
myofibrils
Repeating units of
mucrofibrils.
sarcomeres
Protein
filaments that make up
sarcomeres.
myofilaments
It is the type of muscle tissue that allows
us to move our bodies consciously.
skeletal muscle
a complex
process involving a coordinated
interplay of different cell types.
muscle regeneration
Muscle builders
myoblasts
muscle repair
MYOSATELLITE CELLS:
support
MESENCHYMAL CELLS
The innermost
layer.
endomysium
This layer
surrounds bundles of muscle
fibers called fasicles.
perimysium
The outermost layer
epimysium
the widely
accepted explanation
for how muscle
contracts.
SLIDING FILAMENT THEORY
anchored to Z-lines, which mark the boundaries of
the sarcomere.
actin filaments
located in the center of the sarcomere, with
their heads extending towards the actin filaments.
myosin filaments
THREE MAJOR TYPES OF
SKELETAL MUSCLE FIBERS
1.SLOW OXIDATIVE FIBERS
(TYPE 1)- RED FIBERS
2. FAST OXIDATIVE FIBERS (TYPE
II)- INTERMIDIATE
3. FAST GLYCOTIC FIBERS (TYPE
IIB)- WHITE FIBERS
High fatigue resistance, enabling
them to sustain contractions for long
periods.
SLOW OXIDATIVE FIBERS
(TYPE 1)- RED FIBERS
Allow them to sustain contractions
for moderate periods.
FAST OXIDATIVE FIBERS (TYPE
II)- INTERMIDIATE
Low fatigue resistance, they can only
sustain contractions for short periods.
FAST GLYCOTIC FIBERS (TYPE
IIB)- WHITE FIBERS
Low fatigue resistance
sensory receptors that
provide the central nervous system
with information about the position
and movement of the body.
Proprioceptive organs in skeletal
muscles
TWO MAIN TYPES OF PROPRIOCEPTIVE ORGANS IN SKELETAL MUSCLES
MUSCLE SPINDLES
GOLGI TENDON ORGANS
Responsible
for sensing muscle length and
the rate of change.
muscle spindles
Responsible for sensing muscle
tension
GOLGI TENDON ORGANS
