Molecular physiology refers to the study of the biochemical and biophysical processes that occur within cells and tissues. Synonyms for molecular physiology include cellular physiology, molecular biology, and molecular genetics. These terms describe the same underlying field of study, but focus on different aspects of it. Cellular physiology emphasizes individual cells and their functions, while molecular biology and genetics focus on the genetic and molecular underpinnings of cellular physiology. Other related terms include biochemistry, which deals with the chemical reactions and pathways that occur within cells, and biophysics, which studies the physical properties of biological systems. Together, these fields help us understand the complex interplay of molecules, cells, and organs that make up living organisms.