Motor neurons with small cell bodies usually innervate _________ muscle fibers.
A)Type I
B)Type IIa
C)Type IIb
D)combinations of Type IIa and Type IIb

Question

Motor neurons with small cell bodies usually innervate _________ muscle fibers.​ 
A)Type I 
B)Type IIa 
C)Type IIb 
D)combinations of Type IIa and Type IIb

Quizplus · Accepted Answer

Motor neurons with small cell bodies usually innervate slow twitch (Type I) muscle fibers. Type I fibers have a smaller diameter and contract slowly with low force output, but they have a high resistance to fatigue due to their abundant mitochondria and oxidative capacity. These fibers are important for endurance activities such as long-distance running or cycling.

Motor Neurons with Small Cell Bodies Usually Innervate _________ Muscle