4th December 2019

chegg

18

What is the main difference between simple diffusion and facilitated diffusion?

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In facilitated diffusion, molecules only move with the aid of a protein in the membrane. Simple diffusion is passive but facilitated diffusion is an active process that uses energy. Simple diffusion requires molecules to move through special doorways in the cell membrane.

Considering this, how are simple diffusion and facilitated diffusion different?

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 filtration in anatomy and physiology?

noun, plural: filtrations. (1) The movement of water and solutes across the cell membrane due to hydrostatic pressure from the cardiovascular system. (2) The process of separating suspended particles from the fluid through a porous material in which the fluid can pass while the suspended particles are retained.

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What are the similarities and differences between diffusion and facilitated diffusion?

Similarities: 1.Both move from a region of high concentration to a region of low concentration through a partially permeable membrane. Differences: Facilitated diffusion is for any small particles which can pass through a partially permeable membrance while osmosis is only for water molecules.

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How are simple diffusion and facilitated diffusion similar How are they different?

In facilitated diffusion, substances move into or out of cells down their concentration gradient through protein channels in the cell membrane. Simple diffusion and facilitated diffusion are similar in that both involve movement down the concentration gradient.

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How are osmosis and diffusion alike and how are they different?

Osmosis is the movement of water and is always the movement in the membrane. Diffusion does not need a membrane to make molecules and Diffusion is the movement of molecules. they do not require energy, they both move from a high concentrate to a low concentrate, and they both occur in plants and animals.

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What are the similarities between diffusion and osmosis?

One big difference between osmosis and diffusion is that both solvent and solute particles are free to move in diffusion, but when we talk about osmosis, only the solvent molecules (water molecules) cross the membrane.

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What are the two types of facilitated diffusion and how do they differ?

There are two types of facilitated diffusion carriers:

Channel proteins transport only water or certain ions. They do so by forming a protein-lined passageway across the membrane.
Uniporters normally transport organic molecules, such as sugars and amino acids.

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How is facilitated diffusion different than simple diffusion?

Simple passive diffusion occurs when small molecules pass through the lipid bilayer of a cell membrane. Facilitated diffusion depends on carrier proteins imbedded in the membrane to allow specific substances to pass through, that might not be able to diffuse through the cell membrane.

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What are some examples of simple diffusion?

Example of Simple Diffusion. In the cell, examples of molecules that can use simple diffusion to travel in and out of the cell membrane are water, oxygen, carbon dioxide, ethanol and urea. They pass directly through the cell membrane without energy along the concentration gradient.

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What are the factors that affect the rate of diffusion?

The rate of diffusion is increased when: The distance is decreased. The surface area is increased. The concentration difference (concentration gradient) is increased.

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What are the similarities and differences between facilitated diffusion and active transport?

Both use ion channels to move ions across the cell membrane, in or out of the cell. Differences: Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy. Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP.

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What is the difference between a hydrophilic and hydrophobic substance?

1.Hydrophilic means water loving; hydrophobic means resistant to water. 2.Hydrophilic molecules get absorbed or dissolved in water, while hydrophobic molecules only dissolve in oil-based substances. 4.Hydrophilic molecules are polar and ionic; hydrophobic molecules are non-polar.

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Why is facilitated diffusion important to cells?

A concentration gradient exists that would allow ions and polar molecules to diffuse into the cell, but these materials are repelled by the hydrophobic parts of the cell membrane. Facilitated diffusion uses integral membrane proteins to move polar or charged substances across the hydrophobic regions of the membrane.

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Is facilitated diffusion active or passive?

This process is called passive transport or facilitated diffusion, and does not require energy. The solute can move "uphill," from regions of lower to higher concentration. This process is called active transport, and requires some form of chemical energy.

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How are facilitated diffusion and active transport different?

The main goal is to move substance across the cell membrane. There is one main difference between facilitated diffusion and active transport. With active transport, the protein changes shape by using ATP. Energy is needed in this form of transport because the substances are going against the concentration gradient.

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How does the facilitated diffusion work?

One way in which cells can control diffusion is through the control of movement of particular types of molecules. Some molecules can pass freely through a cellular membrane. Large polar molecules and ions cannot diffuse through the lipid bilayer. Carrier proteins can move molecules across the membrane.

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How are facilitated diffusion and diffusion different?

In facilitated diffusion, molecules only move with the aid of a protein in the membrane. In simple diffusion, molecules move down the concentration gradient but in facilitated diffusion molecules move up the concentration gradient.

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What is the definition of simple diffusion?

The term simple diffusion refers to a process whereby a substance passes through a membrane without the aid of an intermediary such as a integral membrane protein. The force that drives the substance from one side of the membrane to the other is the force of diffusion.

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How are simple diffusion and facilitated diffusion different?

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.

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What are the two main types of transport?

Active Transport. Active Transport is the term used to describe the processes of moving materials through the cell membrane that requires the use of energy. There are three main types of Active Transport: The Sodium-Potassium pump, Exocytosis, and Endocytosis.

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What are the similarities and differences between diffusion and facilitated diffusion?

Similarities: 1.Both move from a region of high concentration to a region of low concentration through a partially permeable membrane. Differences: Facilitated diffusion is for any small particles which can pass through a partially permeable membrance while osmosis is only for water molecules.

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What is passive diffusion?

Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input. Unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

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