Full Definition of VARIATION. 1. a: the act or process of varying: the state or fact of being varied b: an instance of varying c: the extent to which or the range in which a thing varies. 2.: declination 6. a change in the form, position, condition, or amount of something. : something that is similar to something else but different in some way. music: a repeated version of a short piece of music with changes in its rhythm, tune, or harmony.
Types of human physiology. Human physiology is the study of functions of the human body that can be divided into the following types:. Cell physiology. This is the cornerstone of human physiology; it is the study of the functions of cells. Special physiology. This is the study of the functions of special organs.
Muscle physiology: Physiology is the study of the function of living systems, the mechanical, physical, and biochemistry of function and energy transfer. Muscle physiology is concerned with the types of muscle tissues (of which there are three). Here I discuss skeletal muscle specifically.ach muscle fiber in a motor unit is of the same type; hence, motor units are divided into fast and slow units. Generally speaking, slow motor units are innervated by small, slowly conducting motor neurons and fast units by large rapidly conducting motor neurons.