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Describe how increasing the size of a cell will affect the ability of diffusion to transport materials into and out of a cell?
Wiki User
∙ 11y ago
When a cell becomes larger, the surface ratio becomes smaller in proportion.
Take a water bottle for instance. An 8-fluid ounce has about as much plastic as it does fluid (liquid and gas) inside. A 16-fluid ounce has less plastic to fluid ratio. Go up to a 2-liter bottle, and you have much more fluid than you have plastic.
As the surface area increases, the area inside the cell increases faster. It outpaces the surface area, and so less nutrients can get to and enter the cell through its surface. If there isn't enough, the cell will obviously die (esp. because it uses so much nutrients if it is larger), for it can't support itself.
In other words:
If the call is too large, it will have more "middle" than surface.
The surface will be smaller, and will catch less nutrients to feed the cell.
The cell will not be able to support itself, and will die (unless it divides).
Wiki User
∙ 11y ago
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Is a sodium potassium pump active or passive transport and describe why.?
Potassium is distributed by passive diffusion.
Describe the two methods of active transport?
The 2 methods of active transport are taking the energy and using the energy to where the cell is doing the work,the cell will transport what is needed and all us done.
What two characteristics describe active transport?
Two characteristics that describe active transport are that active transport: -require energy -always maintain effervescence, which is the the state in which molecules move from a lower concentration to a higher one.
Describe why diffusion is an important process to your body?
Diffusion is important in the body as it the way oxygen travels from sir in our lung to red blood cells in our blood. It is also the process by which carbon dioxide travel from our blood to our lungs from where it can then be exhaled. The cells also take up some of their nutrients from the blood by diffusion and diffusion is also responsible for our nerves to function as the neurotransmitter diffuses across the synaptic cleft so that the next nerve cell can pick up the signal and pass it along. It is the basic way in which all nutrients, gases and wastes move in the body unless active transport is required which uses protein carriers instead in place where either diffusion is not possible because of the nature of substance or because it has to be transported to an area with an already high concentration of it.
What is the movement of molecules from areas of higher concentration to lower concentration until equilibrium is met?
The movement of particles from an area of high concentration through a semi-permeable membrane to an area of low concentraton is the process of diffusion. I'm sorry but I do not think that answer is good enough. It is a form of diffusion, where only small particles, small enough to pass through the membrane can get through. When I was in school the statement above was the definition of osmosis, the whole point being it was diffusion through a semi-permeable membrane, selecting for only small enough particles. It seems some time between 1992 and 2003 the definition was changed to the movement of water, and not particles and now in 2010 the definition is the movement of solvents. I would like to know how and why the definition osmosis was changed, why and what is the justification? I would also like to know why the original meaning of osmosis, which made perfect sense, has been changed to "it's the definition of diffusion and not osmosis any more", when in fact it isn't a clear enough word to describe the process? Surely the new definition of osmosis is also diffusion?
Name and describe the condition that exists when the diffusion of a particular substance is complete?
Passive Transport (:
Is a sodium potassium pump active or passive transport and describe why.?
Potassium is distributed by passive diffusion.
Describe several ways molecules are moved across a plasma membrane?
Diffusion, osmosis, facilitated transport and active transport- which requires energy to work.
Diffusion and facilitated diffusion?
Diffusion:Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of lower concentration. The time dependence of the statistical distribution in space is given by the diffusion equation. The concept of diffusion is tied to that of mass transfer driven by a concentration gradient, but diffusion can still occur when there is no concentration gradient (but there will be no net flux). diffusion is invoked in the social sciences to describe the spread of ideas.Facilitated diffusion:Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is a process of passive transport, facilitated by integral proteins. Facilitated diffusion is the spontaneous passage of molecules or ions across a biological membrane passing through specific transmembrane integral proteins. The facilitated diffusion may occur either across biological membranes or through aqueous compartments of an organism
What does not describe passive transport?
Active transport requires energy.
Describe this mode of transport, road transport?
travel on the road
How do you describe osmosis?
A special type of diffusion through a membrane
What is the difference between thixotropic materials and pseudoplastic fluids?
While both adjectives describe a fluid with a decreasing viscosity, thixotropic materials exhibit this change as a result of time (under constant shear) while pseudoplastic materials exhibit this change as a result of increasing the rate of shear stress.
What word describe the endocrine system?
Transport
Define term gradient give definition of fick's law?
Fick's laws of diffusion describe diffusion and can be used to solve for the diffusion, the concentration gradient (spatial derivative), or in simplistic terms the concept.
Describe how glucose molecules enter a cell by facilitated diffusion?
protein
Describe methods by which substances enter and leave cells that require cellular energy?
Diffusion is the methods that leave cells. Diffusion also has to have cellular energy.
