THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is a form of passive transport
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This transport is typical for large molecules
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It is how O2 and CO2 travel across the membrane
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Molecules travel with the concentration gradient
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Detailed explanation-1: -Simple diffusion – movement of small or lipophilic molecules (e.g. O2, CO2, etc.) Osmosis – movement of water molecules (dependent on solute concentrations) Facilitated diffusion – movement of large or charged molecules via membrane proteins (e.g. ions, sucrose, etc.)
Detailed explanation-2: -Endocytosis. Endocytosis is a type of active transport that moves particles, such as large molecules, parts of cells, and even whole cells, into a cell.
Detailed explanation-3: -Simple diffusion does not require energy and occurs along the concentration gradient. The concentration gradient is the process of particles moving, or diffusing, from an area of higher concentration to an area of lower concentration.
Detailed explanation-4: -Answer and Explanation: The statement about diffusion that is false is 1) Simple diffusion depends upon specific carrier proteins. Diffusion is a passive process that doesn’t require carrier proteins, but relies on a difference in concentration.