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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Active transport because membrane proteins were used
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Diffusion because the molecules were entering the cell
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Facilitated diffusion because the proteins were not using energy
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Osmosis because the molecules were moving against the concentration gradient
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Detailed explanation-1: -She observes molecules being transported into a cell through proteins present in the cell membrane. These proteins do not use energy to transport the molecules. Which of the following best explains the type of cell transport observed by the scientist? Diffusion because the molecules were entering the cell.
Detailed explanation-2: -In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.
Detailed explanation-3: -Person will know if the transport mechanism in the cell throughout our body is starting not to work not working if they experience problems with movement. 3. Some of the transport mechanisms in cell use energy to move things through the membrane, while others use chemical signals to communicate with other cells.
Detailed explanation-4: -Small nonpolar molecules can easily diffuse across the cell membrane. However, due to the hydrophobic nature of the lipids that make up cell membranes, polar molecules (such as water) and ions cannot do so. Instead, they diffuse across the membrane through transport proteins.
Detailed explanation-5: -Small uncharged polar molecules, such as H2O, also can diffuse through membranes, but larger uncharged polar molecules, such as glucose, cannot. Charged molecules, such as ions, are unable to diffuse through a phospholipid bilayer regardless of size; even H+ ions cannot cross a lipid bilayer by free diffusion.