What is a characteristic of physiology?

The characteristic that focuses on bodily functions and processes is central to the study of physiology. This field examines how various systems within the body operate, interact, and contribute to maintaining homeostasis. It looks at functions such as respiration, circulation, digestion, and reproduction, providing insights into how these processes support overall health and well-being.

In contrast to other scientific disciplines, physiology does not solely focus on the chemical reactions within the body, as suggested by one of the choices. While chemical reactions are certainly a part of physiological processes, physiology encompasses much more than that single aspect. Additionally, examining the structure of cells falls under the domain of histology and anatomy, which differ from the functional focus of physiology. Lastly, anatomy, which deals with the structure and organization of body parts, is distinctly separate from the functional aspects studied in physiology. Thus, the emphasis on bodily functions and processes highlights the comprehensive nature of physiology as a distinct scientific discipline.