What is meant by selectively permeable?
A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport. If a molecule is tiny enough to fit through a special protein channel in the plasma membrane, it will use a form of active or passive transport to move through.
What is selectively permeable membrane short answer?
A membrane that is selectively permeable, i.e. being permeable to only certain molecules and not to all molecules. An example of such membrane is the cell membrane wherein it allows passage of only certain types of molecules by diffusion and occasionally by facilitated diffusion.
What is selectively or semi permeable?
Semipermeable membrane describes a membrane that allows some particles to pass through (by size), whereas the selectively permeable membrane “chooses” what passes through (size is not a factor).
What does it mean to be selectively permeable quizlet?
Selective permeability. Ability of the cell membrane to allow certain substances to pass through while keeping others out. Diffusion. The movement of particles or molecules from an area of high concentration to an area of low concentration. -occurs because molecules are in constant motion.
What is an example of a permeable membrane?
Permeable Membrane in Biology In biology, a simple example of a permeable membrane is a cell wall. In both plant and animal cells, the cell wall is a permeable membrane that allows the passage of particular substances while preventing others. This is known as semi-permeability.
What is another term for selectively permeable Quizizz?
Q. What is another term for “selectively permeable”? Porous.
What is another word for selectively permeable?
semipermeable membrane (redirected from Selectively permeable)
What is the job of a cell’s selectively permeable membrane?
The cell membrane is selectively permeable, meaning it only lets certain things in and out. The structure of the phospholipid bilayer prevents random things from drifting through the membrane, and proteins act like doors, letting the right stuff in and out.
Why can’t you drink salt water Quizizz?
Sea water is hypertonic to your cells and will only further dehydrate you. Sea water is too isotonic to your cells and you will absorb too much water. The salt will cause high blood pressure and you will die from a stroke.
Which part of the membrane is hydrophobic?
The hydrophobic, or “water-fearing,” part of a phospholipid consists of its long, nonpolar fatty acid tails. The fatty acid tails can easily interact with other nonpolar molecules, but they interact poorly with water.
What is the opposite of selectively permeable?
»impermeable adj.biology, membrane, quality.
What are some disadvantages of having a selectively permeable plasma membrane?
Actually there are advantages of selective permeable membrane but some disadvantages exist. Like it allows movement of some other small particles by diffusion, only good for living cells , sometimes density variations causes abnormal changes.
What is a permeable item?
Something that is permeable can be passed through, especially by liquids or gases. A permeable surface allows materials like liquids to pass through — either in or out. Inside the body, the walls of cells are permeable membranes that allow fluids and nutrients to get in and nourish the cells.
