Anatomy & Physiology Question #2
The nurse is providing a patient with a medication that will enter and leave the body cells from an area of higher concentration to an area of lower concentration. Which method of transport is being used by this medication?
- Active transport
- Vesicular transport
The correct answer is D. Concentration gradient is the difference in concentration of a substance across a space. Molecules (or ions) will spread/diffuse from where they are more concentrated to where they are less concentrated until they are equally distributed in that space. Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. The movement of substances from an area of higher to lower concentration does not explain the transport mechanisms of osmosis, active transport, or vesicular transport.
Test Taking Tip