I can’t speak personally as to why PA program admissions at Manitoba and PA Consortium have opted to include those courses as mandatory / or ‘preferred’, however Taking Anatomy, Physiology and Chemistry/Biochemistry provide a good foundation going into your first didactic year in PA school.
Anatomy and physiology as a background is helpful when learning about the medical foundations, different body systems, pathophysiology, understanding symptoms, clinical reasoning, and rationale for different treatment modalities.
Biochemistry is the “study of chemical processes within living organisms”. It is relevant to the study of medicine, as the human body functions as a result of complex biochemical processes.
This is helpful during your unit on immunology, endocrinology, infectious disease, gastroenterology, the coagulation cascade.. and more. The treatment of many conditions relies on an understanding of the biochemical processes that take place in human physiology.
You DO learn anatomy, physiology and biochemistry in PA school, but it certainly helps to have the background going in.
Students who do not have this background may have a bigger learning curve and require a bit of extra studying, but at the end of the day we all write (and pass!) the PA certification exam.