Question: Which of the following statement(s) are correct regarding motor units? Need Assignment Help?
I. Motor units vary in size, with some containing up to 1000 muscle fibers and others only having 10 fibers.
II. All motor units are of the same size, regardless of the muscle they are found in.
III. The number of muscle fibers that are part of a motor unit corresponds to the precision of control of that muscle.
IV. The number of muscle fibers in a motor unit has no impact on the precision of control of that muscle.
Select one:
a. Statements I and III are correct
b. Statements II and III are correct
c. Statements I and IV are correct
d. Only statement IV is correct