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∙ 12y agoNo. Water molecules can osmotically cross the cell membrane because they are small enough that their polarity does not matter. Then there are porins. Channels across the cell membrane that water molecules use.
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∙ 12y agoActive transport requires the use of energy to move a molecule across a cell membrane, usually against its concentration gradient. This process relies on protein pumps that use ATP as an energy source to drive the movement of molecules.
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∙ 14y agoNo, energy is not required because the cell membrane is semi-permeable and allows water molecules (or any solvent molecule) to pass through it from their region of higher concentration to their region of lower concentration (process-osmosis).
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∙ 14y agoEnergy is required when the substance is travelling against a concentration gradient. This means there are more molecules on the other side of the membrane, where the substance is being moved to.
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∙ 12y agoNo. Some water molecules, because they are small, can cross the membrane by osmosis. Then there are the channels called porins that allow water molecules to cross the membrane.
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∙ 14y agoI believe there is here in my textbook it says yes so YES
Wiki User
∙ 10y ago1) When the osmotic gradient points in the opposite direction.
2) When the membrane is NOT permeable to that molecule and active transport is required.
Wiki User
∙ 13y agoActive transport
Wiki User
∙ 12y agoactive transport
Wiki User
∙ 13y agoActive transport
active transport
Facilitated diffusion
Facilitated diffusion
Movement across a membrane that does require energy is called active transport.
Facilitated diffusion uses proteins to move a molecule across the cell membrane without energy.
active transport
Facilitated diffusion
Active transport
Facilitated diffusion
Facilitated diffusion uses proteins to move a molecule across the cell membrane without energy.
Active transport, which requires energy in the form of ATP to move substances against their concentration gradient across a cell membrane. This process involves specific protein pumps that bind to the molecule being transported, consuming ATP to change conformation and move the molecule across the membrane.
Movement across a membrane that does require energy is called active transport.
Facilitated diffusion uses proteins to move a molecule across the cell membrane without energy.
active transport
ginger kids
active transport
Active transport