Central Nervous System
Intensity and amplitude are proportional to (LQ)
1. Weber-Fechner Law Q: - "It has been taught that the magnitude of the sensation felt is proportionate to the log of the intesity of the stimulus".
"The frequency of the action-potential generated by a stimulus to a sensory nerve fiber is also related to the intensity of the initiating stimulus by a power function"
2. Starling's Law of the Heart or Frank-starling law Q
(length-tension relationship in cardiac muscle): - states that "the energy of contraction is proportional to the initial length of the cardiac muscle fiber" for the heart, the length of the muscle fibers (i.e. the extent of preload) is proportionate to the end-diastolic volume.
2. Poiseuille-Hagen-formula Q→shows the relation between the flow (F) in the long narrow tube (L) the viscosity (η) of the fluid, and the radius ® of the tube.