Anatomy & Physiology: Core Concepts and Systems Overview

Which of the following best describes the difference between simple diffusion and facilitated diffusion across a cell membrane?

A patient is diagnosed with a genetic disorder that affects the function of sodium-potassium pumps in their cells. Which of the following cellular processes is most likely to be directly impaired?

Which of the following equations correctly represents the relationship between the rate of diffusion ($J$), the diffusion coefficient ($D$), the surface area ($A$), the concentration gradient ($\Delta C$), and the thickness of the membrane ($\Delta x$)?