A membrane is permeable to a substance when the substance can cross it by diffusion.
If the membrane only allows certain substances to pass through
, it is a differentially permeable membrane. If only the solvent and not the solute can cross the membrane, it is a semipermeable membrane.
What does a differentially permeable membrane mean?
A membrane that allows the passage of small molecules but not of large molecules
. From: differentially permeable membrane in A Dictionary of Zoology »
Which is differentially permeable example?
the capacity of a membrane to allow some particles to pass through but not others. Such ‘differentially permeable’ membranes (e.g.
CELL MEMBRANE, cellular organelle membrane, TONOPLAST
) allow water molecules to pass readily through them, whereas solutes dissolved in water can pass less rapidly or not at all.
Which cell is differentially permeable?
Cell membrane or plasma membrane
helps to maintain the shape of the cell. In addition to this, this membrane is differentially permeable due to its structure. It is composed of a phospholipid bilayer with proteins embedded in the lipid layer.
What does selectivity permeable mean?
Selective permeability of the cell membrane refers
to its ability to differentiate between different types of molecules
, only allowing some molecules through while blocking others.
What is an example of a permeable membrane?
The most common example is the phospholipid bilayer cell membrane that surrounds every cell in our bodies. Another example of a selectively permeable membrane is
the inner membranes of an egg
. … Phospholipids are molecules composed of a hydrophilic, or water-loving, head and a hydrophobic, or water-fearing, tail.
What are the three types of permeable membrane?
- semipermeable membrane.
- partially-permeable membrane.
- differentially-permeable membrane.
What is the difference between differentially permeable and selectively permeable?
| Semipermeable membrane Selectively permeable membrane | It does not allow solutes to pass through it. It allows selected solutes to pass through it to a limited extent. |
|---|
Can water pass through a selectively permeable membrane?
The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot.
Water can pass through between the lipids
.
Which is differentially permeable objective?
differentially permeable membrane
A membrane that allows the passage of small molecules but not of large molecules
. See semi-permeable.
What is selectively permeable membrane class 9?
The plasma membrane is called a selectively permeable membrane as
it permits the movement of only certain molecules in and out of the cells
. Not all molecules are free to diffuse. If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.
What are some examples of selectively permeable materials?
- Vacuum filter- it traps dust but allows air through.
- Coffee filter- allows water to pass through, but does not allow the coffee grounds.
- Colander -used to strain liquid food from foods. it drains water but is not permeable to larger food particles.
How do you use selectively permeable in a sentence?
A selectively permeable membrane is a membrane that
does not permit the free unhampered movement of all
solutes present. These mobile ions are called counter-ions and the membrane is selectively permeable to them.
What is another word for selectively permeable?
semipermeable membrane
(redirected from Selectively permeable)
What is an example of permeable?
Capable of being permeated or passed through, used especially of substances where fluids can penetrate or pass through. For example,
wood is permeable to oil
.
What is the meaning of freely permeable?
Fully permeable or Freely permeable means
it allows all the substances to pass through it
. … Impermeable means it does not allow any substances to pass through it.
