Muscle part 2 Flashcards
1
Q
A _____ is a motor neuron and all the muscle fibers it innervates
A
Motor unit
2
Q
Connection of motor nerve fibers and muscle fibers occurs at the myoneural junction or _____ on the surface of the sarcolemma.
A
motor end-plate
3
Q
Explain Type I muscle fibers
A
slow twitch non-fatiguing red fibers slow oxidative aerobic High in Mitochondria
4
Q
Explain Type IIA muscle fibers
A
fast twitch
anaerobic/glycolytic
fatigue resistant
pink or light red fibers
5
Q
Explain Type IIB muscle fibers
A
fast twitch rapid fatiguing high force anaerobic/ glycolytic White (most pale) fibers
6
Q
Explain Type II D/X muscle fibers
A
fast twitch rapid fatiguing high force anaerobic/ glycolytic similar to type IIB Slower contraction speed
