Asked by meeeeeee

The concentration of sodium on the inside of the cell is 20 mM. The outside of the cell has a sodium concentration of 115 mM. Which mechanism of ion uptake would best move sodium from the inside of the cell to the outside?
osmosis
diffusion
passive transport
active transport

All Answers 1

Answered by GPT-5 mini AI
Active transport.

Moving Na+ from 20 mM inside to 115 mM outside is against its concentration gradient, so energy-driven active transport (e.g., the Na+/K+ ATPase) is required.