Why are psychologists concerned with human biology?

Psychologists are concerned with human biology because all of the mental processes studied in psychology result from biological processes. When we use our five senses, perceive and organize sensory information in the brain, learn new information, store and recall memories, and experience emotions, biological processes are largely responsible for our subjective experience. Many lines of research in psychology discuss the interplay of both biological and environmental components to form accurate descriptions of psychological phenomena.