Table of Contents
What does semipermeable mean quizlet?
What does selectively permeable (semi-permeable) mean? It is a property of cell membranes that allows some substances to pass through, while others cannot.
What is the correct definition of semipermeable?
Definition of semipermeable : partially but not freely or wholly permeable specifically : permeable to some usually small molecules but not to other usually larger particles a semipermeable membrane.
Which definition is the best for semipermeable membrane quizlet?
A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport.
What definition is the best for semipermeable membrane?
A semipermeable membrane is a membrane that only allows certain types of particles to move through it under certain conditions. You can think of it as being like a sheet of biological fabric with holes in it, where some molecules can fit through the holes and others can’t.
Which part of the cell is semipermeable?
The cell membrane
The cell membrane is semipermeable (or selectively permeable). It is made of a phospholipid bilayer, along with other various lipids, proteins, and carbohydrates.
What is meant by semipermeable with regards to describing the cell membrane quizlet?
What is meant by semipermeable with regards to describing the cell membrane? a. The cell membrane allows water-insoluble molecules to pass freely, but severely restricts the flow of water-soluble molecules and ions.
What is another word for semipermeable?
What is another word for semipermeable?
| permeable | penetrable |
|---|---|
| pervious | porous |
| absorbent | absorptive |
| spongy | passable |
| accessible | enterable |
Why is the membrane semipermeable?
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.
What is porosity quizlet?
Porosity. The percentage of open spaces in a rock or sediment. Permeability. The ability of water to flow easily through a rock or sediment.
What is permeable and semi-permeable?
Permeable membrane: Membrane which allows the passage of all materials through it. Semi-permeable membrane: Membrane which allows some materials to pass through it. Here size is a factor for the passage of materials.
What is the function of semi-permeable membrane?
Semipermeable membranes are used for reverse osmosis where an applied pressure selectively forces water from a solution through the membrane to separate it from solute. Strong synthetic membranes are required for effective, i.e., high pressure, purification.
Why is the plasma membrane said to be semipermeable?
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.