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In retail, sales per unit area is a standard and usually the primary measurement of store success. The unit of area is usually square metres in the metric system or square feet in U.S. customary units. Square feet are also widely used in retailing in the United Kingdom, but there are signs of a trend towards use of square meters.
Henneman’s size principle describes relationships between properties of motor neurons and the muscle fibers they innervate and thus control, which together are called motor units. Motor neurons with large cell bodies tend to innervate fast-twitch, high-force, less fatigue-resistant muscle fibers , whereas motor neurons with small cell bodies ...
The motor neuron and all of the muscle fibers to which it connects is a motor unit. Motor units are split up into 3 categories: [21] Slow (S) motor units stimulate small muscle fibers, which contract very slowly and provide small amounts of energy but are very resistant to fatigue, so they are used to sustain muscular contraction, such as ...
This defines 'cost drivers' not just as a simple variable in a function, but as something that changes the function itself. For example, the driver 'economy of scale' leads to different costs per unit for different scales of operation (a small cargo vessel is more expensive per unit than a large bulk carrier), and the driver 'capacity ...
A more everyday example relates to grocery shopping: a 2 kg package sells for a higher price than 1 kg package of the same foodstuff, but what matters is the "specific price", commonly called the unit cost (cost in currency units per kilogram).
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Groups of motor units often work together as a motor pool to coordinate the contractions of a single muscle. The concept was proposed by Charles Scott Sherrington. [2] Usually muscle fibers in a motor unit are of the same fiber type. [3] When a motor unit is activated, all of its fibers contract.
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