When the filtrate flow in the DCT is too low or the filtrate is too dilute, cells in the juxtaglomerular apparatus called _____ cells STOP secreting a chemical signal which causes the _____. As a result, GFR increases.

3000+ review questions on anatomy and physiology. 

Anatomy refers to the internal and external structures of the body and their physical relationships, whereas physiology refers to the study of the functions of those structures.