Table of Contents
- 1 What is the driving force of simple diffusion?
- 2 What is the driving force for positive diffusion?
- 3 What is driving force in mass transfer?
- 4 What is the major force driving diffusion?
- 5 What are the 3 types of diffusion?
- 6 What are examples of diffusion?
- 7 Does diffusion require energy?
- 8 What is the major difference between facilitated diffusion and passive diffusion?
- 9 What are the terms of the driving force for diffusion?
- 10 When is a solute able to diffuse through a membrane?
What is the driving force of simple diffusion?
The driving force for simple diffusion is the concentration gradient, and membrane potential gradient. In order for molecules to diffuse either in/out of the cell, they have to pass through the hydrophobic core of the lipid bilayer.
What is the driving force for positive diffusion?
More generally, the driving force for the diffusion constitutes the chemical potential gradient of the particles that diffuse (provided that no other forces act on the particles). Correspondingly, the driving force for the transport of electrical charges is the electrical potential gradient.
What is driving force in mass transfer?
The driving force in the mass transfer is the potential chemical difference, which means the transfer of chemical place occurs from higher chemical potential to lower chemical potential. Chemical potential depends on various parameters like concentration, pressure, and temperature.
What is the driving force of diffusion if the process does not require energy?
For transcellular passive diffusion, molecules pass through the bilayer cell membrane into the intracellular space. It is driven by concentration gradient of drugs from high concentration to low concentration and does not require energy from the cell.
What are the characteristics of simple diffusion?
Some of the differences are as follows:
| Characteristics | Simple Diffusion |
|---|---|
| Size of molecules | Simple diffusion is mostly involved in the passage of small non-polar molecules. |
| Channel proteins | In simple diffusion, the movement of molecules occurs either through the general surface of the membrane |
What is the major force driving diffusion?
In the general definition, the driving force of diffusion is the chemical potential gradient. So yes, under some conditions, you could have a diffusion flux from a point with lower concentration (higher chem. potential) to a point with higher concentration (lower chem. potential).
What are the 3 types of diffusion?
The three types of diffusion are – simple diffusion, osmosis and facilitated diffusion.
- (i) Simple diffusion is when ions or molecules diffuse from an area of high concentration to an area of low concentration.
- (ii) In osmosis, the particles moving are water molecules.
What are examples of diffusion?
10 examples of diffusion in everyday life
- You can smell perfume because it diffuses into the air and makes its way into your nose.
- Cigarette smoke diffuses into the air.
- A few crystals of potassium permanganate in water will diffuse and turn the water purple.
What are the 4 types of heat transfer?
Various heat transfer mechanisms exist, including convection, conduction, thermal radiation, and evaporative cooling.
What is the difference between mass transfer and diffusion?
The main difference between mass transfer and diffusion is that mass transfer may or may not involve a concentration gradient whereas diffusion does involve the movement of a solute down a concentration gradient.
Does diffusion require energy?
Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.
What is the major difference between facilitated diffusion and passive diffusion?
Table: Simple vs Facilitated Diffusion
| Simple Diffusion | Facilitated Diffusion |
|---|---|
| Example of simple diffusion: passive transport of small nonpolar molecules across the plasma membrane | Example of facilitated diffusion: passive transport of glucose and ions into and out of the cell |
What are the terms of the driving force for diffusion?
Terms in this set (40) The driving force for diffusion is b. the kinetic energy of the molecules in motion. In diffusion, molecules move a. from high concentration to low concentration. Which of the following dialysis membranes has the largest pore size? d. 200 MWCO Avogadro’s number is a constant for the number of b. molecules.
When does diffusion stop what do we say?
When diffusion stops, we say the solution has reached a. equilibrium. Molecules need a carrier protein to help them move across a membrane because d. they are lipid insoluble or they are too large. Which of the following is true of facilitated diffusion? c. Movement is passive and down a concentration gradient.
Which is the following is true of facilitated diffusion?
Which of the following is true of facilitated diffusion? c. Movement is passive and down a concentration gradient. Examples of solutes that might require facilitated diffusion include d. all of the above. Which of the following would not affect the rate of facilitated diffusion?
When is a solute able to diffuse through a membrane?
When a solute is able to diffuse through a membrane b. equilibrium is reached. Water diffuses c. toward solutes Filtration is a process that c. is passive. Filtration is dependent upon a b. hydrostatic pressure gradient. The filtrate d. All of these answers are correct.