Concept explainers
Concept introduction:
Active transportis a cellular process in which the proteins present in the cell membrane utilize energy for the movement of ions or molecules across the plasma membrane, against a concentration gradient. After the movement of these ions and molecules, the active transport also restores the concentration gradient.
Active transport proteins contain two sites meant for binding. The other site that is present on the inner side of the plasma membrane is used for binding ATP. This ATP releases energy by breaking bonds between last three phosphate groups in an ATP molecule to form ADP and release a phosphate. This released energy helps the protein to shift shape and allow the movement of ion or molecule across the membrane.
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COWAN CONNECT ACCESS CARD MICROBIOLOGY:
- The passive movement of a solute through a membrane protein down its concentration gradient is an example of _________. a. osmosis b. active transport c. endocytosis d. diffusionarrow_forwardWhich of the following methods of transport is being used to transfer the substance into the cell in the accompanying graph? a. diffusion down a concentration gradient b. osmosis c. facilitated diffusion d. active transport e. vesicular transport f. It is impossible to tell with the information provided.arrow_forwardList the means of unassisted membrane transport.arrow_forward
- The principal force driving movement in diffusion is______. a. temperature b. particle size c. concentration gradient d. membrane surface areaarrow_forwardA transport protein requires ATP to pump sodium ions across a membrane. This is a case of ______. a. passive transport b. active transport c. facilitated diffusion d. a and carrow_forwardCompare and contrast the following methods of a passing cell membrane in terms of movement with respect to the concentration gradient, use of ATP, and the use of transporters with examples. Active Transport vs Passive Transportarrow_forward
- The movement of a substance across a membrane, from low to high concentrations of that substance (requiring the expenditure of energy, often in the form of ATP hydrolysis), is always categorized as: active transport facilitated diffusion simple diffusion passive transport osmosisarrow_forwardDescribe the difference between passive and active forms of transport across a cell membrane.arrow_forwardCompare and contrast the following methods of a passing cell membrane in terms of movement with respect to the concentration gradient, use of ATP, and the use of transporters with examples. (Simple) Diffusion Facilitated Diffusion/Passive Transport Osmosis Active Transport Exocytosis Endocytosis (with its 3 subforms)arrow_forward
- Define the following? concentration gradient diffusion osmosis facilitated diffusion active transportarrow_forwardCompare and contrast the following methods of a passing cell membrane in terms of movement with respect to the concentration gradient, use of ATP, and the use of transporters with examples. (Simple) diffusion vs Facilitated diffusionarrow_forwardWhich of the following involves movement from an area of high concentration to an area of lower concentration simple diffusion facilitated passive transport both simple diffussion and facilitated passive transport active transportarrow_forward
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