Read e-book online Principles of Biological Regulation. An Introduction to PDF

By Richard Jones

ISBN-10: 0123899508

ISBN-13: 9780123899507

ISBN-10: 0323153534

ISBN-13: 9780323153539

Ideas of organic Regulation

summary: rules of organic legislation

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D. The secretion of aqueous is an active process, the rate of which depends upon neural and hormonal factors as well as arterial pressure. Either hypersecretion or increased resistance in the pathway will lead to excessive pressures throughout the system, with resultant pain and deterioration (glaucoma). e. Changes in the flow resistance may occur at a number of points. A reduction in the cross-section area for flow between the iris and lens leads to pupillary block. The angle of the anterior chamber may narrow (angle closure glaucoma).

Only the steady-state relations are shown in this figure. c. The block diagram in (c) provides another way of representing this system in which not only flows but any other physical quantity may serve as the input and output variables. The relations between the variables may be given in either graphical or algebraic form (Riggs, 1970). d. From the standpoint of the whole organism, only β ι and Q6 may be of interest, and the additional flows in the second compartment may appear as constants or parameters in the overall relation.

The terms appearing on the right-hand side of the equations are either independent variables or constants. One can regard Q\ and ß 3 as independent variables, or inputs, either or both of which might be changed in a given problem. This set of equations is in canonical, or standard, form. c. Note that there are seven equations in seven dependent variables, so that any six of the variables can be eliminated to leave a single equation in one dependent variable. Presumably Qe is the variable of interest, and the resulting equation would be a relation between Qe, the independent variables Qi and ß 3 , and the parameters.

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Principles of Biological Regulation. An Introduction to Feedback Systems by Richard Jones

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