Motor Unit Function — Flashcards

The maximum contractile force of any muscle per square cm cross-sectional area is _____ kg/cm2

Slow twitch muscle fibers are _____ due to increased myoglobin concentration

Hint: (color)

In the muscle stretch reflex, stretch increases afferent impulses via _____ and II nerve fibers

Fast twitch muscle fibers perform less _____ due to decreased mitochondria

Stretch reflex:Activation of _____ motor neurons leads to direct contraction of the muscle

Which nerve fiber afferents innervates all three muscle spindle fibres (dynamic nuclear bag, static nuclear bag, and nuclear chain fibers)?_____

The first step of muscle contraction occurs when the _____ neuron depolarizes, opens Ca2+ channels and ACh is released into the motor end plate.

A mass of many smooth muscle fibers contract together in _____-unit smooth muscle system

Chemical Events during Muscle Contraction: No answer _____

_____ is absent in smooth muscle but present in skeletal muscle

Hint: Micro-component