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1. Active Transport - The Definitive Guide | Biology Dictionary
Link: https://biologydictionary.net/active-transport/
Description: webMay 16, 2020 · Definition. Active transport is the process of transferring substances into, out of, and between cells, using energy. In some cases, the movement of substances can be accomplished by passive transport, which uses no energy. However, the cell often needs to transport materials against their concentration gradient.
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2. Active transport review (article) | Khan Academy
Link: https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/facilitated-diffusion/a/hs-active-transport-review
Description: webActive transport. During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport. Image credit: OpenStax Biology.
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3. Active transport: primary & secondary overview (article) - Khan Academy
Link: https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/facilitated-diffusion/a/active-transport
Description: webActive transport mechanisms can be divided into two categories. Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.
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4. Active transport - Wikipedia
Link: https://en.m.wikipedia.org/wiki/Active_transport
Description: webIn cellular biology, active transport is the movement of molecules or ions across a cell membrane from a region of lower concentration to a region of higher concentration —against the concentration gradient. Active transport requires cellular …
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5. 3.6: Active Transport - Biology LibreTexts
Link: https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Concepts_in_Biology_(OpenStax)/03%3A_Cell_Structure_and_Function/3.06%3A_Active_Transport
Description: webSep 21, 2021 · Home. Bookshelves. Introductory and General Biology. Concepts in Biology (OpenStax) 3: Cell Structure and Function. 3.6: Active Transport.
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6. 5.4: Active Transport - Biology LibreTexts
Link: https://bio.libretexts.org/Courses/Reedley_College/Biology_for_Science_Majors_I/05%3A_Structure_and_Function_of_Plasma_Membranes/5.04%3A_Active_Transport
Description: webDec 18, 2021 · Active transport mechanisms, collectively called pumps, work against electrochemical gradients. Small substances constantly pass through plasma membranes. Active transport maintains concentrations of ions and other substances needed by living cells in the face of these passive movements.
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7. Passive transport and active transport across a cell membrane …
Link: https://www.khanacademy.org/test-prep/mcat/cells/transport-across-a-cell-membrane/a/passive-transport-and-active-transport-across-a-cell-membrane-article
Description: webPrimary active transport: Molecules moving against their gradient coupled to the hydrolysis of ATP: Yes: Sodium-potassium pump, proton pump / atrial fibrillation, acid reflux: Secondary active transport: Molecule going with + molecule going against gradient: Yes: Sodium-calcium exchanger, SGLT2
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8. Active transport - Definition and Examples - Biology Online
Link: https://www.biologyonline.com/dictionary/active-transport
Description: webMay 5, 2022 · Active transport is a kind of cellular transport where substances move against a concentration gradient. This means that the direction is from an area of lower concentration to an area of higher concentration. Hence, this process will require the expenditure of energy, and the assistance of membrane proteins, such as carrier proteins.
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9. Active Transport - Biology Encyclopedia - cells, body, process
Link: http://www.biologyreference.com/A-Ar/Active-Transport.html
Description: webActive transport is the movement of molecules up their concentration gradient , using energy. Concentration Gradients. The concentration of most molecules inside a cell is different than the concentration of molecules in the surrounding environment.
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10. Physiology, Active Transport - StatPearls - NCBI Bookshelf
Link: https://www.ncbi.nlm.nih.gov/books/NBK547718/
Description: webSep 12, 2022 · Active transport requires energy for the process by transporting molecules against a concentration or electrochemical gradient. Active transport is an energy-driven process where membrane proteins transport molecules across cells, mainly classified as primary or secondary, based on how energy is coupled to fuel these mechanisms.