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ErinWeeks Group Title

HELP PLEASEE (: Which means of particle transport is shown in Figure 7–4 above?

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    A. diffusion B. osmosis C. facilitated diffusion D. active transport

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  3. Fathomspace Group Title
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    Active transport

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    Fath is correct but Fath try to list an explanation as-well. Active transport is the movement of a substance across a cell membrane against its concentration gradient (from low to high concentration). In all cells, this is usually concerned with accumulating high concentrations of molecules that the cell needs, such as ions, glucose and amino acids. If the process uses chemical energy, such as from adenosine triphosphate (ATP), it is termed primary active transport. Secondary active transport involves the use of an electrochemical gradient. Active transport uses energy, unlike passive transport, which does not use any type of energy. Active transport is a good example of a process for which cells require energy. Examples of active transport include the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.

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    Sure.

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