Which one of the following is an example of transport against electrochemical gradient? A. Diffusion B. Facilitated diffusion C. Osmosis D. Na/glucose cotransport E. Oxygen transpo... Which one of the following is an example of transport against electrochemical gradient? A. Diffusion B. Facilitated diffusion C. Osmosis D. Na/glucose cotransport E. Oxygen transport
Understand the Problem
The question is asking for an example of a transport mechanism that occurs against an electrochemical gradient. This typically involves processes that require energy to move substances in a direction opposite to the gradient.
Answer
Na/glucose cotransport.
The final answer is Na/glucose cotransport.
Answer for screen readers
The final answer is Na/glucose cotransport.
More Information
Na/glucose cotransport is an example of secondary active transport, where glucose is transported into cells against its concentration gradient using the energy from sodium moving down its gradient. This process does not directly use ATP but relies on the gradient set up by primary active transport.
Tips
A common mistake is to think that only primary active transport moves molecules against a gradient. Secondary active transport, like Na/glucose cotransport, also achieves this by using the potential energy from another molecule's gradient.
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