Biology

Biology, 31.07.2019 07:00, autumnkiewel200

The diagram above shows the movement of water molecules across a plasma membrane that is not requiring energy. which term best classifies this movement? \

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Biology, 30.07.2019 13:30, kohat485

Active transport is like facilitated diffusion in that both processes facilitate the movement of water through the phospholipids of the plasma membrane move molecules down their concentration gradient require the presence of proteins in the plasma membrane that move molecules from one side of the plasma membrane to the other do not require a source of energy

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Biology, 31.07.2019 18:50, leo4687

The diagram above shows the movement of water molecules across a plasma membrane that is not requiring energy. which term best classifies this movement? \

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Biology, 28.09.2019 04:30, markaylarowland8

The diagram shows sodium ions and potassium ions moving against their concentration gradients to cross the plasma membrane. which statement best describes how this movement is possible? question 4 options: the ions move across the semipermeable membrane through simple diffusion. atp provides the energy required to move the ions across the plasma membrane by active transport. water moves across the plasma membrane by osmosis and carries the ions with it.

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Biology, 07.10.2019 16:10, arslonm777

Some molecules, such as water, , and gases, need no assistance crossing the differentially permeable membrane as they are small and uncharged. these molecules are said to flow down their concentration gradient as they move from an area where their concentration is to an area where their concentration is . called transport, these molecules are able to slip between the hydrophilic heads of the phospholipids and pass through the hydrophobic tails of the membrane. water molecules will enter the cell either by diffusing across the plasma membrane, or in some cells, by using special water channels called that allow larger amounts of water to cross the membrane. substances requiring proteins but no energy expenditure to move with a concentration gradient across a membrane do so through . for other substances, such as those moving against concentration gradients, large or polar substances, or some ions, energy is required through a process called transport. this type of transport allows large molecules and some ions to use proteins to assist them across plasma membranes. these proteins are specific for the substances they transport across the plasma membrane and include substances such as sodium ions, , and glucose.

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