Finasteride is in a class of medications called 5-alpha reductase inhibitors. Finasteride treats BPH by blocking the body's production of a male hormone that causes the prostate to enlarge. Finasteride treats male pattern hair loss by blocking the body's production of a male hormone in the scalp that stops hair growth.
The electron. It is found within energy levels called orbits. They are denoted by K,L,M,N,O,...... The electron. It is found within energy levels called orbits. They are denoted by K,L,M,N,O,......
Key Concepts. 1  The electrons surrounding an atom are located in regions around the nucleus called âenergy levelsâ. 2  An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be. 3  The first energy level is closest to the nucleus.