CONTROL SYSTEMS IN ANATOMY
is centralized master control of physiological functions mediated by the pituitary
gland, the hypothalamus, and the CNS. This control has a genetic basis in
the form of DNA. DNA has 6x10e9 bits of information called codons. These represent 10E7 genes. Each gene codes for one protein
molecule. Command and control in physiology relate very well to the concept of tauhid. For efficiency there must be a controlling center otherwise contradictions
from many un-coordinated centers of control will lead to failure. An orderly and harmonious universe cannot have more than
one master. Examples of control are the integrity of DNA despite continuous mitosis, normal cell growth, control of embryological
2.0 CONTROL SYSTEMS IN PHYSIOLOGY and BIOCHEMISTRYExamples of control
are control of balance (fluids, electrolytes, iron, acid-base, heat energy, and temperature). There is balance between entropy (disorder) and order, between coagulation and fibrinolysis,
between sympathetic and parasympathetic systems, between left and right brain hemispheres, between anabolism and catabolism.
Chemical reactions tend to an equilibrium as defined in the Hasselbach-Henderson law.
Phenomena of control manifest as control of the heart beat, control of vomiting, control of swallowing, control of
coughing, control of gagging, control of posture, control of micturition, control of defecation, control of lactation, control
of parturition, control of cell membrane permeability, control of genetic expression, and control of hormonal receptors. Phenomena
of periodicity manifest as cycling of matter between organic and inorganic and the circadian rhythm. Constancy and predictability
are the basis for diagnostic tests and drug action.