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What is diffusion be able to tell which direction molecules will diffuse?
Wiki User
∙ 14y ago
Diffusion is the process by which something dissolved in a fluid will move from higher concentrations to lower concentrations. A drop of food coloring in a glass of water will gradually diffuse throughout the entire glass until it is a uniform color.
In Biology, diffusion is commonly across a membrane (like a cell membrane). If the concentration of sodium is higher on one side of a membrane, and it can pass through the membrane, it will move from the higher concentration to the lower until the two sides have the equal concentration.
Wiki User
∙ 14y ago
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What are the characteristics of gaseous exchange surfaces?
Features of gas exchange surfacesHave a large surface area relative to the volume of the organism.They are thin, so have a short diffusion pathway.They have a moist surface where gases can dissolve first before they diffuse in our out.They are able to maintain the diffusion gradient down which the gases can diffuse.
Which term refers to the diffusion of water molecules through a slestively permaeable membrane?
The movement of water through a selectively permeable membrane is called diffusion. Water will always diffuse down a concentration gradient, from high solute concentration to low solute concentration.
Why do liquids show the phenomenon of diffusion to more extent than solids?
Diffusion appears in liquids and gases because the molecules are able to move freely. Therefore, the molecules are able to move down their concentration gradient. In solids however, the molecules are packed so tightly that a negligible amount of movement occurs and inhibits diffusion.
What characteristics is more likely to make a substance diffuse through the cell membrane?
Size. Actually very few substances are able to diffuse across the menbrane, most must be transported ie facilitated diffusion, active transport, or receptor-mediated endocytosis. Carbon dioxide, oxygen, water, and some lipid substances are able to diffuse across the membrane
How are the smaller molecules o2 and co2 able to pass through the openings of the cell membrane?
passive transport by diffusion
Explain why some substances were able to pass through the membrane while others were not able to?
because some molecules are bigger then othersand won't diffuse into the cell... hope that helps
What are the characteristics of gaseous exchange surfaces?
Features of gas exchange surfacesHave a large surface area relative to the volume of the organism.They are thin, so have a short diffusion pathway.They have a moist surface where gases can dissolve first before they diffuse in our out.They are able to maintain the diffusion gradient down which the gases can diffuse.
What molecule is able to easily diffuse across the cell's membrane?
Carbon dioxide, oxygen and some nonpolar molecules diffuse easily.
What are features of gaseous exchange surfaces in animals?
Have a large surface area relative to the volume of the organism.They are thin, so have a short diffusion pathway.They have a moist surface where gases can dissolve first before they diffuse in our out.They are able to maintain the diffusion gradient down which the gases can diffuse.
Which term refers to the diffusion of water molecules through a slestively permaeable membrane?
The movement of water through a selectively permeable membrane is called diffusion. Water will always diffuse down a concentration gradient, from high solute concentration to low solute concentration.
Why do liquids show the phenomenon of diffusion to more extent than solids?
Diffusion appears in liquids and gases because the molecules are able to move freely. Therefore, the molecules are able to move down their concentration gradient. In solids however, the molecules are packed so tightly that a negligible amount of movement occurs and inhibits diffusion.
What particles can diffuse directly through the lipid bi-layer?
As the bilayer contains hydrophobic fatty acid tails, water-soluble molecules cannot diffuse directly through. However, lipid soluble molecules such as oxygen can diffuse directly through. Overall, for a molecule to be able to diffuse directly through it must be lipid-soluble, relatively small and non-polar.
What characteristics is more likely to make a substance diffuse through the cell membrane?
Size. Actually very few substances are able to diffuse across the menbrane, most must be transported ie facilitated diffusion, active transport, or receptor-mediated endocytosis. Carbon dioxide, oxygen, water, and some lipid substances are able to diffuse across the membrane
How are the smaller molecules o2 and co2 able to pass through the openings of the cell membrane?
passive transport by diffusion
How does the molecular rate affect rate of diffusion?
First, we must understand what diffusion is! Diffusion is the movement of particles from a high concentration to a lower concentration, in order to reach equilibrium. Cells in particular need this to maintain homeostasis, or an internal equilibrium (stability). Do you mean molecular size or composition, perhaps? Bigger particles are harder to move than smaller molecules. Additionally, physical constitution of a particle will affect the rate of diffusion. Think of a mouse squeezing under a door as compared to a rock, of the same size. A mouse will more easily be able to squeeze through the gap Edit The rate of diffusion is inversely proportional to square root of its inverse of its molecular weight
Why don't starch molecules pass through partially permeable membranes?
Albumin and starch molecules are too big to diffuse across cell membranes. They will not be able to diffuse from the intestine into the blood and from blood into the cells.
Would sugar's starch or salt diffuse faster in a dialysis bag?
When considering a dialysis bag, size will determine whether the molecules will permeate the bag. The smaller the molecules, the easier they well be able to pass through, and the faster diffusion will take place. Starch is a carbohydrate - a macromolecule formed from repeating bonded units of glucose monomers. Salt, in comparison, is simply Na+ and Cl- ions (in the aqueous solution). Starch will have a much tougher time getting through the artificial membrane, so it is a safe bet that salt will diffuse faster.
