Models of physiological control systems are valuable aids to the medical profession. A

Chapter 0, Problem P1.9

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Models of physiological control systems are valuable aids to the medical profession. A model of the heart-rate control system is shown in Figure PI.9 [23,24,48]. This model includes the processing of the nerve signals by the brain. The heart-rate control Stretuh lungs ill frequency V z Nerve frequency Medulla, brain Pressure receptors Nerve frequency ir >' Pre ssure Heart Vascular system X * Heart rate FIGURE P1.9 Heart-rate control. 41 system is, in fact, a multivariate system, and the variables x, v, w, v, Z, and u are vector variables. In other words, the variable x represents many heart variables .rj, x2,. , x. Examine the model of the heart-rate control system and add or delete blocks, if necessary. Determine a control system model of one of the following physiological control systems: 1. Respiratory control system 2. Adrenaline control system 3. Human arm control system 4. Eye control system 5. Pancreas and the blood-sugar-level control system 6. Circulatory system

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