regulation of whole muscle Flashcards
aerobic training leads to…
conversion of fast glycolytic fibers to fast oxidative fibers
increase oxidative ability through more mitochondria
more capillaries
anaerobic training leads to
increase glycogen storage
increase fiber diameter
How do satellite cells contribute to fiber diameter
increases fiber diameter by generating more myofibrils
Hypertrophy is mediated by ?
satellite cells- they generate more myofibrils
what can activate satellite cells?
muscle contraction
growth hormones
muscle stress/tension/damage
how does increasing the # of nuclei impact the cell size and functionality
size: satellite cells add myofibrils
functionality: more transcription
Motor Unit
a motor nerve and all the muscle fibers it innervates
how can a muscle increase force generation
my recruitment of other motor units
T or F: A motor unit is comprised of varies types of muscle fiber
False
Slow oxidative fibers have what size motor unit ?
they have smaller motor units
these are recruited first
fast oxidative fibers have what type of motor unit? -size
intermediate motor units
-recruited second
fast glycolytic fibers have what type of motor unit- size?
largest motor unit
usually recruited during intense exercise
what are proprioceptors?
refine movement and prevent muscle from injury
muscle spindle ( proprioceptor )
responds to muscle stretch and compression
- provides feedback to the brain about muscle length - signals to the CNS
- protects muscle from over stretching
what are extrafusal fibers?
they generate force
fibers outside of the muscle spindle
innervated by alpha fiber/motor neuron
