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โˆ™ 2021-10-21 16:19:40
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Q: Does simple diffusion work with or against the concentration gradient?
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What is main idea of diffusion?

diffusion is the movement of a substance with respect to concentration and gradient a substance traveling with the concentration gradient ( simple diffusion) a substance traveling against the concentration gradient (active diffusion)

What is the differences between simple and active diffusion?

Simple diffusion goes with a concentration gradient and does not use ATP where active transport uses ATP to go against a concentration gradient.

Does simple diffusion follow a concentration gradient?

Simple diffusion does follow a concentration gradient. Simple diffusion moves small or lipid-soluble solutes through the membrane without the aid of a protein.

What requires more energy simple diffusion or active transport?

Active transport requires energy, as this moves against a concentration gradient. Simple diffusion does not require any energy input - as this moves down a concentration gradient.

Why does simple diffusion end?

Simple diffusion depends on a concentration gradient being present, so as soon as that gradient disappears, diffusion stops. That is to say, diffusion stops when the concentration on each side of the diffusion barrier is the same, or is solution, when the concentration is the same throughout, and there are no longer any areas of high and low concentration.

Simple diffusion and facilitated diffusion are related in that both?

depend on a concentration gradient

How is active transport different from simple diffusion and facilitated diffusion?

Simple diffusion = flow of small molecules ALONG the concentration gradient, does NOT require energy. facilitated diffusion = flow of molecules ALONG the concentration gradient with help of CARRIER PROTIENS or CHANNELS, does NOT require energy active transport= flow of larger or charged molecules AGAINST their concentration gradient, REQUIRES input of ENERGY in the form of ATP.)

What is necessary for simple diffusion?

1, concentration gradient 2. diffusion constant >0

Does simple diffusion go from low to high concentration?

no. High concentration to low concentration. The molecules move down the concentration gradient.

Process when move from high concentration to low concentration?

Simple diffusion is the process in which solutes travel along a concentration gradient.

A type of passive diffusion where water moves down the concentration gradient through a semipermeable membrane is?

simple diffusion! :)

What is the random movement of molecules and ions down their concentration gradient called?

The random movement of molecules and ions down their concentration gradient (meaning from an area of high concentration to an area of low concentration) is called simple diffusion. Simple diffusion is related to the magnitude of driving force, permeability of the membrane, and surface area.

How do particles move from an area of high to an area of low concentration?

In cells, diffusion moves by facilitated diffusion, active transport, ABC transporters, group translocation or osmosis. Some of these move molecules from a low concentration to a higher and against the gradient.Simple diffusion moves molecules from a high concentration to a lower concentration.

What is simple diffusion?

Simple diffusion is the net movement of substances from a region of high concentration to a region of low concentration so its overall net movement is along the concentration gradient. Simple diffusion does not require energy therefore it is 'passive', substances are diffused across the membrane between the phospholipids.

What functions might each of the three types of diffusion serve in an independent cell such as a paramecium or an amoeba?

The three types of diffusion in an independent cell are simple diffusion, facilitated, and active. The function of simple diffusion is to transfer oxygen. Facilitated diffusion transports water or non polar molecules. Active diffusion transports materials against the concentration gradient.

How would you best describe simple diffusion?

Substances moving down a concentration gradient passively.

How does lipid soluble solutions move across a plasma membrane down their concentration gradient?

Simple diffusion

How is faciliated transport similar to simple diffusion?

Facilitated and simple diffusion both transport solutes along a concentration gradient and neither processes require any ATP expenditure.

Why is facilitated diffusion faster than simple diffusion?

Facillatated diffusion is faster than simple diffusion when solute concentration is low because it uses channels to transport molecules throught the lipid bilayer. Simple diffusion depends upon concentration gradients so the net movement of diffusing molecules depends on the concentration gradient, thus the rate of diffusion is directly proportional to the concentration gradient. Simple diffusion is also a type of passive transport, which requires no energy input, whereas facilitated diffusion is protein mediated transport. Passive diffusion of solute into a cell is linearly related to the concentration of solute outside the cell. Carrier proteins increase the rate of diffusion by allowing more solute to enter the cell. Facilitated diffusion, however, approaches a maximum rate as the carrier proteins become saturated with solute.

What type of transport does water use to cross the cell membrane?

Water crosses the cell membrane through simple diffusion down a concentration gradient.

Two types of passive transports are?

PASSIVE TRANSPORTS ARE OF TWO TYPES. 1)SIMPLE DIFFUSION 2)FACILITATED DIFFUSION 1)SIMPLE DIFFUSION:-diffusion of water and dissolved gas is simple. when concentration on both sides of membrane becomes the same,it stops. 2)FACILITATED DIFFUSION:-this also occurs along concentration gradient with help of carrier molecules.

Compare and contrast diffusion and facilitated diffusion?

simple diffusion and facilitated diffusion are similar and different similarity : both of them helps the passage of molecules down their concentration gradient ( from higher concentration to lower concentration ) and no energy required in both difference : facilitated diffusion might use carrier proteins to help move molecules such as glucose through the plasma membrane or channel proteins to move water rapidly (aquaporin)

Is facilitated diffusion an active or passive transport?

Facilitated diffusion is passive transport as no energy is used, and a protein channel is all that's required. After that it is simple diffusion down a concentration gradient. Anything with the word diffusion in it is passive transport. Diffusion is just the principle of passive transport.

What is called the molecules that help substances move through the cell membrane during active transport and facilitated diffusion?

In simple diffusion, small noncharged molecules or lipid soluble molecules pass between the phospholipids to enter or leave the cell, moving from areas of high concentration to areas of low concentration (they move down their concentration gradient). Oxygen and carbon dioxide and most lipids enter and leave cells by simple diffusion.

How are facilitated diffusion and active transport similar ad how do the differ?

active transport requires the usage of energy in the form of ATP to move something against is concentration gradient. Facilitated diffusion is a form of simple diffusion in that the substance moves along with its concentration gradient, but it requires the use of a transport protein. Polar molecules are unable to passively diffuse through the lipid bilayer because of its hydrophobicity, even if it is moving with its concentration gradient. Membrane transport proteins are required to allow them to be moved in or out of the cell, but they do not require ATP to complete the process. Similar to active transport, they require the use of a membrane protein for movement through the membrane, but unlike active transport, it does not require the use of any energy.