[Solved] Which of the following is the correct statement about membrane permeability and ion potential? A)The concentration of potassium ions is the same extracellularly and intracellularly. B)The concentration of potassium is higher extracellularly than intracellularly. C) The concentration of sodium is higher extracellularly than intracellularly. D) The concentration of sodium is lower extracellularly than intracellularly. Optical Microscopes: Instruments that use visible light and a system of lenses to magnify small objects, allowing for the observation of details not visible to the naked eye. Physicians' Office Laboratories: Labs located within a physician's office where various tests are performed on clinical specimens to obtain information about the health of a patient. Objectives: The set of magnifying lenses contained in the nosepiece of a compound microscope. Optical Microscope: An instrument that uses visible light and a system of lenses to magnify images of small subjects.