15) Are some types of motor units easier to recruit? (2pts)
a) No, it is equally easy to recruit all types of motor units.
b) Yes, it is easier to recruit slow motor units.
c) Yes, it is easier to recruit fast, fatigable motor units.
d) Yes, it is easier to recruit fast, fatigue-resistant motor units.
16) Are some types of motor units more likely to be used more often? (3pts)
a) No, all motor units are used equally often.
b) Yes, slow motor units are used most often.
c) Yes, fast, fatigable motor units are used most often.
d) Yes, fast, fatigue-resistant motor units are used most often.
