What affects the rate of simple diffusion versus facilitated diffusion?

Rate of Diffusion Simple Diffusion: The rate of simple diffusion is directly proportional to the concentration gradient across the membrane as well as the membrane permeability of the solute molecule. Facilitated Diffusion: The rate of facilitated diffusion depends on the kinetics of carrier-mediated transport.

What does the rate of simple diffusion depend on?

The rate of diffusion, dn/dt, is the change in the number of diffusing molecules inside the cell over time. Since the net movement of diffusing molecules depends on the concentration gradient, the rate of diffusion is directly proportional to the concentration gradient (dC/dx) across the membrane.

What factors facilitate help in diffusion?

Factors affecting facilitated diffusion

• Concentration Gradient. Concentration gradient across the membrane is an essential factor that regulates the diffusion process.
• Temperature.
• Saturation.
• Selectivity.

What is the rate of facilitated diffusion?

the transport relies on molecular binding between the cargo and the membrane-embedded channel or carrier protein. the rate of facilitated diffusion is saturable with respect to the concentration difference between the two phases; unlike free diffusion which is linear in the concentration difference.

Why facilitated diffusion is faster than simple diffusion?

At low solute concentration, facilitated diffusion typically proceeds faster than simple diffusion (i.e., is facilitated) because of the function of the carrier. However, at higher concentrations, the carriers will become saturated and facilitated diffusion will level off.

How are simple diffusion and facilitated diffusion different?

The difference is how the substance gets through the cell membrane. In simple diffusion, the substance passes between the phospholipids; in facilitated diffusion there are a specialized membrane channels.

What is facilitated diffusion simple?

Facilitated diffusion is the passive movement of molecules across the cell membrane via the aid of a membrane protein. It is utilised by molecules that are unable to freely cross the phospholipid bilayer (e.g. large, polar molecules and ions)

What is the driving force for facilitated diffusion?

The driving force behind this type of passive transport is also a concentration gradient between different compartments (e.g., the extracellular space and the intracellular space).

What variables increased the rate of facilitated diffusion of glucose?

What variable(s) increased the rate of facilitated diffusion of glucose? Your answer: increasing the number of membrane carriers.

What factors are required for facilitated diffusion to occur quizlet?

An input of energy is needed to speed up the rate of facilitated diffusion. An input of energy is needed to allow the movement of molecules from an area of low concentration to one of higher concentration.

What makes facilitated diffusion different from simple diffusion?

How Does facilitated diffusion?

In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. A concentration gradient exists for these molecules, so they have the potential to diffuse into (or out of) the cell by moving down it.

What does not affect the rate of facilitated diffusion?

You correctly answered: Movement is passive and down a concentration gradient. You correctly answered: all of the above. Which of the following would not affect the rate of facilitated diffusion? You correctly answered: the amount of intracellular ATP.

What characteristics distinguish simple diffusion from facilitated diffusion?

Does facilitated diffusion require energy explain?

Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. B. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.

What do simple and facilitated diffusion have in common?

The common feature shared both by simple diffusion and facilitated diffusion is. both require energy for the transport of substances. both involve the movement of substances from regions of lower concentration to higher concentration without expenditure of energy.

What’s the difference between simple diffusion and facilitated diffusion?