Which movement of a substance requires cellular energy and uses a membrane protein to move the substance against its concentration gradient?
Correct answer: C. Active transport
- A. Simple diffusion
- B. Facilitated diffusion
- C. Active transport
- D. Osmotic movement
Explanation
Active transport uses energy, usually ATP, to move substances against their concentration gradient through transport proteins. Facilitated diffusion uses a protein but moves substances down the gradient without cellular energy.
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About Cells and Tissues
Cells and tissues covers cell membranes, cytoplasm, organelles, cell division and the transport of substances into and out of cells. It also explains the four basic tissues, epithelial, connective, muscular and nervous, including their structure, functions and locations, with a distinction between tissue organization and organ structure.
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