Post differentials. (a). A post differential may be granted on the basis of conditions of environment which differ substantially from conditions of environment in the continental United States and warrant additional pay as a recruitment and retention incentive.
We will also see that in order for a neuron to generate an action potential, the membrane potential has to depolarize from the resting value of around â70 mV to the threshold value of around â50 mV. A similar situation is also at play in muscle cells (skeletal, cardiac, and smooth).
A skeletal muscle comprises a bundle of muscle cells, or myofibers (Figure 18-26a). A typical muscle cell is cylindrical, large (1âââ40 mm in length and 10âââ50 Î¼m in width), and multinucleated (containing as many as 100 nuclei). myofiber is packed with myofibrils, bundles of filaments that extend the length of the cell. Myofibrils are further subdivided into alternating light and dark bands, which are aligned along the length of the muscle cell, giving the myofiber a striated appearance in the light microscope.