Control of Accommodation (Focusing the Eyes)

The accommodation mechanism—that is, the mechanism that focuses the optical device of the eye—is essential for a high degree of vision. Accommodation results from contraction or relaxation of the attention …

Sources of Energy for Muscle Contraction

We have already seen that contraction depends on energy equipped by adenosine triphosphate. Most of this energy is required to actuate the walk-along mechanism by which the cross-bridges pull the …