What process can move molecules against a concentration gradient?
Understand the Problem
The question is asking about the process that enables molecules to move from an area of lower concentration to an area of higher concentration, which typically requires energy input.
Answer
Active transport.
The process that moves molecules against a concentration gradient is called active transport.
Answer for screen readers
The process that moves molecules against a concentration gradient is called active transport.
More Information
Active transport is a critical process in cellular functions, necessary for maintaining concentration gradients of ions and molecules different from their surroundings. This process is vital for nerve impulse propagation, nutrient absorption, and waste elimination.
Tips
A common mistake is confusing active transport with passive transport. Unlike passive transport, active transport requires energy expenditure because it moves substances against their natural flow.
Sources
- Active transport: primary & secondary overview (article) - khanacademy.org
- Physiology, Active Transport - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
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