LABORATORY REVIEW
DIFFUSION AND OSMOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they only happen in living cells
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they require transport proteins
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they are passive transport mechanisms
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net movement of substances is against the concentration gradient
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Detailed explanation-1: -Both diffusion and osmosis are passive transport processes, which means they do not require any input of extra energy to occur. In both diffusion and osmosis, particles move from an area of higher concentration to one of lower concentration.
Detailed explanation-2: -To incorporate the movement of molecules in and out of the cell, two types of transport systems exist, namely osmosis and diffusion. These two systems are passive transport systems as they do not require any additional energy to function (however, facilitated diffusion requires ATP).
Detailed explanation-3: -Osmosis is a form of passive transport when water molecules move from low solute concentration(high water concentration) to high solute or low water concentration across a membrane that is not permeable to the solute. There is a form of passive transport called facilitated diffusion.
Detailed explanation-4: -Diffusion, osmosis and active transport all involve the movement of particles.
Detailed explanation-5: -The simplest forms of transport across a membrane are passive. Passive transport does not require the cell to expend any energy and involves a substance diffusing down its concentration gradient across a membrane.