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What part if the cell is selectively permable?
the cell membrane
The movement of water across a membrane is termed?
it is called osmosis and it is the net movement of water particles across a semi-permable membrane against the concentration gradient!
What does the term permable mean?
Selectively permeable refers to a cell membrane that will let certain things in and out of the cell, but block other things.
What is the key point to remember about osmosis?
Osmosis is the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration across a selectively permeable membrane. It is important to note that osmosis is a passive process driven by the concentration gradient and does not require energy input from the cell.
What does the term selectively permable mean?
"Selectively permeable" refers to a membrane that allows certain substances to pass through while blocking others. This selectivity is based on the size, charge, or other properties of the molecules trying to cross the membrane. An example is a cell membrane, which permits the passage of specific molecules necessary for the cell's function while blocking others.
What is the meaning of selectively permable?
Selectively permeable means that only certain objects can pass through. I've encountered that phrase in cell Biology, when talking about cell membranes. The cell membrane is made of phospholipids that only allow certain substances through. Water can pass through because the molecules are small enough to pass through small holes in the membrane. Other molecules, such as sodium or potassium, can be transported using protiens.
What is selectively permable?
Will only allow something of a certain size or with certain characteristics to pass through.
How does the structure of the lipid bilayer help it to function as a semi-permable membrane?
The lipid bilayer's structure consists of hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward, creating a barrier that selectively allows certain molecules to pass. This arrangement restricts the movement of polar substances while enabling small nonpolar molecules to diffuse freely. Additionally, embedded proteins facilitate specific transport processes, enhancing the membrane's selective permeability. Overall, the bilayer's unique composition and organization enable it to maintain cellular integrity while regulating the exchange of materials.
Osmosis is a specific form of?
Osmosis is a very specific type of diffusion. Osmosis is defined as the movement of water from higher concentration to lower concentration. This type of diffusion is unique as it only really involves water movement which occurs through a membrane that is considered semi-permable.
What is semi-permable?
It means that is/can be a door to a cell 'hence semi permeable membrane? (or to anything)
Why is it important for the cell membrane to be a selectivly premeable?
It is important because, if the cell membrane was not selectivly permable, we would not be able to do the things today.
Is water enters a cell through a cell wall by a process called osmosis true?
It is not accurate to say that water enters a cell through a cell wall via osmosis. Osmosis is the movement of water across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration. In plant cells, water enters through the cell membrane and moves into the vacuole.
