Which type of transport requires energy to move substances across the cell membrane?

Understand the Problem

The question is asking to identify which type of transport mechanism across a cell membrane requires energy. The options provided include active transport, passive transport, facilitated diffusion, and diffusion, of which the respondent needs to choose the correct one.

More Information

Active transport expends energy, usually through ATP, to move substances against their concentration or electrochemical gradient.

Sources

• Active transport: moving against a gradient - Khan Academy - khanacademy.org
• Physiology, Active Transport - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
• Passive transport and active transport across a cell membrane article - Khan Academy - khanacademy.org