Chapter 5 contains several examples that demonstrate some of the 8 general princ

Question

Chapter 5 contains several examples that demonstrate some of the 8 general principles of physiology described in Chapter 1. For example, we see in Chapter 5 that certain forms of cell signaling require a supply of ATP to form cAMP, a major second messenger, and to phosphorylate proteins. Without a constant supply of ATP, most cell signaling pathways would be deficient or impossible. Classify this example according to the general principle it best represents. Homeostasis is essential for health and survival. Most physiological functions are controlled by multiple regulatory systems, often working in opposition. Physiological processes require the transfer and balance of matter and energy. Information flow between cells, tissues, and organs is an essential feature of homeostasis and allows for integration of physiological processes. The functions of organ systems are coordinated with each other. Controlled exchange of materials occurs between compartments and across cellular membranes. Physiological processes are dictated by the laws of chemistry and physics. Structure is a determinant of- and has coevolved with -function.

Explanation / Answer

The best-suited principle of physiology for the example given will be "Homeostasis is essential for health and survival"

Explanation: Homeostasis can be defined as a property by which our system maintains or regulates a steady supply/concentration of biomolecules and other substances in solution. In that context, a minimum threshold of ATP should always be present in our system without which cell signaling will be impaired. If, the ATP levels get depleted, then processes like cell signaling and phosphorylation of proteins will be affected which will initiate a cascade of other issues severely affecting the overall function of the body. So, the process by which a constant supply of ATP is maintained (there by not compromising the downstream signaling process) is a classic example of our body maintaining homeostasis.

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