Question

Which principle states that motor units are recruited in order according to their recruitment thresholds and firing rates?

A) Size principle
B) Specificity principle
C) Overload principle
D) Reversibility principle

Answer 1

The Size principle is the principle that states motor units are recruited in order according to their recruitment thresholds and firing rates. For example, when picking up a feather, smaller motor units are activated, while lifting a heavy weight recruits larger motor units.

Step-by-step explanation:

The principle that states motor units are recruited in order according to their recruitment thresholds and firing rates is the Size principle. The Size principle suggests that smaller motor units with lower thresholds are recruited first, followed by larger motor units with higher thresholds as more force is needed. This sequential recruitment of motor units allows for precise control of muscle contraction.

Size principle is the principle that states motor units are recruited in order according to their recruitment thresholds and firing rates. For example, when picking up a feather, smaller motor units are activated, while lifting a heavy weight recruits larger motor units.