[Solved] Using platforms such as Facebook and Instagram to influence and engage with consumers is known as A) telenutrition. B) telehealth. C) social media marketing. D) nutrition counseling. E) private practice. Microscopic Units: Small units of measurement typically used to describe dimensions of cells and microorganisms, not visible to the naked eye. Calyx: The cuplike division of the kidney pelvis. Medulla: A central region of an organ, notably in the brain (medulla oblongata) affecting vital functions like breathing and heart rate, and in the kidney involved in regulating electrolyte balance. Renal Papillae: The apex of the renal pyramid, which projects into the renal pelvis and where urine flows into the ureter.