What is the term given for fiber types within the skeletal muscle the - ProProfs
     

What is the term given for fiber types within the skeletal muscle the generate force and movement?



A. Intrafusal
B. Thick filament
C. Extrafusal
D. Thin filament
E. Nuclear chain fibers

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neuromuscular system-sem 2 yr 1

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John Smith

John Smith

Answered on Sep 08, 2016

Extrafusal-extrafusal are the series of linked sarcomeres (z line-zline)(thick myosin and thin actins) the shortening of sarcomeres generates force and movement via alpha motor neuron ap>release of ach>binds to nicotinic receptoe>epp>ap in musc membrane intrafusal=not controlled by alpha motor neuron-even though actin and myosin parallel to extrafusal nuclear chain fibers wrap around end of intrafusal as sensory nerve fibers along with nuclear bag fibers- they report musc contraction status via gamma efferents they are regulators-adjusting sensitivity of sensory system they influence flow of info through 1a and 11 afferents

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