What does physiology study?

Physiology is the branch of biological sciences that focuses on how living organisms function. It encompasses the study of various systems within organisms, including how organs and tissues work and interact to maintain life processes. This involves understanding biochemical processes, cellular functions, and the interactions of various physiological systems such as the nervous, muscular, and circulatory systems.

While options related to the mechanics of physical exercises, muscle structure, and the impact of exercises on mental health address important aspects of physical health and fitness, they represent more specific fields of study within or related to physiology. The broad nature of physiology as a discipline makes option B the most accurate representation of what physiology studies. Understanding how organisms function on a fundamental level is essential for various applications in health sciences, including sports medicine, where the function and performance of the body are critical.