Question: Which Two Factors Determine The Selective Permeability Of Biological Membranes?

In this article, it is shown that membrane permeability to water and solutes is dependent on the temperature, medium osmolality, types of solutes present, cell hydration level, and absence or presence of ice.

What are the two main factors that determine membrane permeability?

The permeability of a membrane is affected by temperature, the types of solutes present and the level of cell hydration. Increasing temperature makes the membrane more unstable and very fluid.

What determines selective permeability?

Selective permeability refers to the one of the distinctive characteristics of the plasma membrane. The plasma membrane is the membrane that contains the cytoplasm. In the animal cell, it is the outermost covering. The plasma membrane is capable of being selectively permeable because of its structure.

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What are 2 factors that determine what can pass through the membrane and where?

Two factors determine whether a molecule will cross a membrane: (1) the permeability of the molecule in a lipid bilayer and (2) the availability of an energy source.

What accounts for the selective permeability of the biological membrane?

The phospholipids are tightly packed, and the membrane has a hydrophobic interior. This structure alone creates what is known as a selectively permeable barrier, one that only allows substances meeting certain physical criteria to pass through it.

What factors affect selective permeability of the cell membrane?

In this article, it is shown that membrane permeability to water and solutes is dependent on the temperature, medium osmolality, types of solutes present, cell hydration level, and absence or presence of ice.

What factors affect permeability?

Factors affecting Soil Permeability

  • Factors affecting permeability include Particle size, Void ratio, Permeant, Shape of particles, Degree of saturation, soil fabric, Impurities in water and Adsorbed cation on clay mineral surface.
  • Permeability is the ease with which the water can flow through soil.

What are the 3 types of permeability?

There are 3 types of permeability: effective, absolute, and relative permeabilities. Effective permeability is the ability of fluids to pass through pores of rocks or membranes in the presence of other fluids in the medium.

How the structure of biological membranes influences selective permeability?

Transport Across the Cell Membrane The phospholipids are tightly packed together, and the membrane has a hydrophobic interior. This structure causes the membrane to be selectively permeable. A membrane that has selective permeability allows only substances meeting certain criteria to pass through it unaided.

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What is selective permeable?

A selectively-permeable membrane is a membrane that allows only some substances and molecules to pass into or leave the cell. An example of a selectively-permeable membrane is the cell membrane. It allows the passage of only certain types of molecules through diffusion and occasionally by facilitated diffusion.

What are two factors that would determine whether or not a particular protein is produced in the cell?

Step 1

  • a. Number of proteins in the body.
  • b. Necessity to produce the protein.
  • The cell will only produce proteins that are needed to maintain cellular function and if it is needed by other cell processes.

What can 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.

What easily passes through the cell membrane?

Small or Nonpolar Oxygen is a small molecule and it’s nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell. Small uncharged lipid molecules can pass through the lipid innards of the membrane.

What are the types of selective permeability?

Selective permeability of the cell membrane exam links There are three types of passive transport – diffusion, facilitated diffusion, and osmosis. Diffusion helps small, non-polar molecules, like oxygen and carbon dioxide, move across the membrane, from an area of high concentration to low concentration.

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Which of the following is an example of selective permeability?

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. All cells in our body are surrounded by a phospholipid bilayer.

Which model explains selective permeability of plasma membrane?

In Robertson’s model of plasma membrane.

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