Introduction

There are two reasons to study a response of various biological objects— cells, tissues, organs — to the action of the physical factors of the different nature (ultrasound [144, 715, 1063], electric [226, 284, 617, 882] or magnetic field [100, 891], radio-frequency (RF) electromagnetic field [96, 247–249, 545, 1038, 1043], ionizing radiation [147], laser radiation [491, 668, 832, 1005,1027], extreme temperatures—either high or low [1128]):

• To assess the effects of the natural and technogenic impacts on the living organisms;

• To use physical fields in medicine for both diagnostics [201] and therapy, greatly enhancing the armamentarium of the modern physician.

Biological effects caused by physical factors are not necessarily pathogenic for human: they may or may not result in adverse health effect. Note that the biological effect could be significant even for the weak action that play a role of a trigger in this case [100, 1038]. For instance, the human visual system is known to have an extremely high sensitivity: the energy of a nerve impulse is by several orders of magnitude larger than the energy of the quantum of light that triggered it; the necessary additional energy is provided by the biology system itself, usually in some way through the metabolic processes [1038]. The observed frequency-dependent biological effects of the electromagnetic field are usually attributed to the absorption in the certain bands of the biological molecules.