L41 BIOL 3110 Lecture Notes - Lecture 1: Blood Plasma, Internal Control, Comparator

• School: WUSTL
• Department: Biology And Biomedical Sciences
• Course: L41 BIOL 3110
• Professor: Stein Paul

Document Summary

Understand what does the body does to survive. Physiology: study of body function that occurs that occurs in an intermediate level of organization between that of the cell and the whole organism. Understand the rules of body function (how the body works). When the regulation fails, the probability that the organism dies is high. Many internal control systems in our body and they function to control many controlled variables. Plasma (blood plasma): liquid extracellular non cellular component of the blood. Regulation achieved by internal control systems in the body. Controlled variable: system variable that is measured and controlled. Comparator is present in some controllers but not all. Closed loop system: made of a sensor, controller, and effector to keep a controlled variable at the set point. Compares the current value of something to the set point. Out of the comparator is the error signal. Absolute value of error signal should be near 0 for a good system.