Multiple Choice
Which of the following is needed for water to be absorbed by the roots through osmosis?
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6. The Membrane
Osmosis
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Which type of passive transport specifically involves the movement of water molecules across a selectively permeable membrane?
A
Active transport
B
Facilitated diffusion
C
Simple diffusion
D
Osmosis
Verified step by step guidance1
Understand the concept of passive transport: Passive transport is the movement of substances across a cell membrane without the use of energy by the cell. It relies on the concentration gradient of the substance being transported.
Recognize that osmosis is a specific type of passive transport: Osmosis refers to the movement of water molecules across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration.
Differentiate osmosis from other types of passive transport: Unlike simple diffusion (movement of solutes) or facilitated diffusion (movement of solutes with the help of transport proteins), osmosis specifically involves water molecules.
Identify the role of the selectively permeable membrane: In osmosis, the membrane allows water molecules to pass through while restricting the movement of certain solutes, ensuring the selective movement of water.
Relate osmosis to biological systems: Osmosis is crucial for maintaining cell homeostasis, such as regulating water balance in cells and tissues, which is essential for proper cellular function.
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