Extrafusal muscle fibers are innervated by ________________________.
 | |
 |
gamma motor neurons; |
 |
alpha motor neurons; |
 |
Golgi motor neurons; |
 |
spindle motor neurons; |
 |
none of the alternatives provided is correct; |
INCORRECT - This is a nonsensical expression.
[Review Part 1 of the tutorial] [Review Part 2 (Matching) of the tutorial]