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This is unique to each cell. Some particles are small enough to diffuse freely in most cells. Other particles require varying types of transport mechanisms to cross the cell membrane. If it is a substance the cell either needs to take in or get rid of, there are proteins and other mechanisms to accomplish this. There are even actions of the cell in order to export or import substances.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoThere are two ways that the molecules move through the membrane: passive transport and active transport. Active transport requires that the cell use energy that it has obtained from food to move the molecules (or larger particles) through the cell membrane. Passive transport does not require such an energy expenditure, and occurs spontaneously.
The principle means of passive transport is diffusion. Diffusion is the movement of molecules from a region in which they are highly concentrated to a region in which they are less concentrated. It depends on the motion of the molecules and continues until the system in which the molecules are found reaches a state of equilibrium, which means that the molecules are randomly distributed throughout the system.
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∙ 14y agosemipermeable membrane can pass through the cell membrane easily
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∙ 11y agoSolute.
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∙ 6y agoWater.
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The degree in which materials are able to flow freely through a cells membrane is known as?
study island : permibility
How does the cell membrane support cells in getting needed nutrients?
Cell membranes have a number of ways that needed nutrients can pass through. The first and easiest way is by diffusion where certain particles are able to pass through the membrane directly where the are in short supply. Other particles, because they don't mix well with the lipids that make up the membrane can pass through certain protein channels in a process called facilitated diffusion. In a closely related process to diffusion where particles aren't able to cross the membrane but water can, osmosis takes place. Sometimes when cell need to move nutrients into already crowded areas they use energy in a process called active transport to kind force particles across the membrane where they don't want to go. A very special type of active transport called phagocytosis occurs when a cell wants to take in particles that are simply too large to pass through the membrane so the membrane actually stretches out and engulfs the particle in a vesicle where it can be dismantled into smaller components inside the cell. I hope that helps!
What are the particles in a liquid able to do?
The particles of a solid can only vibrate about their fixed positions while the particles of a liquid can vibrate, rotate and translate (move from 1 place to another) within the liquid.
The particles of a substance move independately of one another?
Well, that depends on what state of matter they are in. a solid can move, but cannot move freely as it is bound to one spot by the gravitational forces. water would be able to move freely in a confined space. and gas can move freely as long as there is nothing blocking its path.
How importance of semi permeability of the plasma membrane in the maintenance of cell life?
By having a semi-permeable membrane, the cell is able to regulate or control certain factors. Firstly, regulation of the concentration of substances, can be easily passed through the membrane as long as they are non-polar. Secondly, osmotic pressure of the cell can be regulated, in which the amount of water within the cell can be controlled to prevent bursting. Also, semi-permeable also does not allow other substances such as proteins to necessarily pass through the membrane freely, giving more control over the actions taken by the cell.
The degree in which materials are able to flow freely through a cells membrane is known as?
study island : permibility
Which particles-starch or Lugol's-were able to cross the model cell membrane?
The particles that were able to cross the model cell membrane was the Lugol's solution.
Why is the tonicity of a solution important?
TONICITY describes the degree to which a solution can exert an osmotic pressure on a membrane. Particles which can freely cross a membrane do NOT affect tonicity. This is because they will freely move in order to achieve equilibrium. Therefore, tonicity is dictated by the particles than can't cross the membrane (such as proteins, which are usually too large to cross, or highly charged particles). Non-permeable particles will therefore force water to cross the membrane towards them in order to achieve equilibrium - they can therefore be said to exert an osmotic pressure on the membrane.Solutions can be HYPERTONIC (i.e. the surrounding solution contains a larger concentration of these non-permeable particles than inside the cell, causing water to LEAVE the cell) or HYPOTONIC (i.e. the opposite, where water moves INTO the cell). They can also be ISOTONIC (there is equilibrium of the non-permeable particles, so no water moves).There is a very important distinction between tonicity and OSMOLARITY: osmolarity ALSO takes into account the particles that CAN cross the membrane (the permeable ones). So a solution could be both HYPEROSMOLAR and ISOTONIC at the same time - one set of particles will be able to freely cross the membrane, so there will no net change in cell volume.
Why is a liquid able flow?
a liquid is able to flow because its freely moving particles allow liquid to flow from place to place
What three things can pass through a cell membrane or cell wall easily?
no., not all types of the molecules can not pass through the cell wall in few case some of the organelles can pass but if they ire in the favor on the cell wall. and if they do passe then they do pass from the cytoplasm of the cell., it is generally appeared in the plant cell.
What allow electricity to flow easily?
Basically, the fact that there are charged particles that are able to move around freely.
What solids made of?
Particles. Just like liquids and gases. The difference between them is that solids have tighter packed particles that are less able to move freely
How does the cell membrane support cells in getting needed nutrients?
Cell membranes have a number of ways that needed nutrients can pass through. The first and easiest way is by diffusion where certain particles are able to pass through the membrane directly where the are in short supply. Other particles, because they don't mix well with the lipids that make up the membrane can pass through certain protein channels in a process called facilitated diffusion. In a closely related process to diffusion where particles aren't able to cross the membrane but water can, osmosis takes place. Sometimes when cell need to move nutrients into already crowded areas they use energy in a process called active transport to kind force particles across the membrane where they don't want to go. A very special type of active transport called phagocytosis occurs when a cell wants to take in particles that are simply too large to pass through the membrane so the membrane actually stretches out and engulfs the particle in a vesicle where it can be dismantled into smaller components inside the cell. I hope that helps!
What is a state of matter when the particles are close together but can move?
If you are asking when particles are "able to move freely" that would be a liquid. If you simply ask about "moving" then that would be a solid, since in a solid the particles are still movings.
What are the particles in a liquid able to do?
The particles of a solid can only vibrate about their fixed positions while the particles of a liquid can vibrate, rotate and translate (move from 1 place to another) within the liquid.
Can gas particles move around freely?
When a small source creates an scent (say an air freshener or candle) the scent spreads through a large area and decreases in intensity. This diffusion is due to the constant motion of gas particles.
What cell structure that allows cummunication between internal and external cell environment?
The cellular membrane allows communication between the internal and external environment. Through movement, particles are able to flow throughout the body.
