How are concentration gradients maintained for diffusion?
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Asked in Biology
What are the adaptation that speed up diffusion in living organisms?
Asked in Alveoli
How are the concentration gradients in the alveoli maintained?
Asked in Biology, Genetics, Biochemistry
How does concentration gradient affect diffusion?
Asked in Human Anatomy and Physiology
Diffusion is important in body fluids because it tends to?
Asked in Elements and Compounds
What concentration gradients are established and maintained by the sodium-potassium exchange pump?
Asked in Biology, Microbiology, Genetics
Substances tend to move according to their concentration gradients by the process of?
What happens when diffusion moves molecules across the plasma membrane?
Asked in Genetics
Facilitated diffusion carrier proteins and cell membrane pumps both?
Asked in Science
Which affects the rate of diffusion through a semipermeable membrane?
What is the effect of solute size and concentration gradients on diffusion across selectively permeable membranes?
Asked in Genetics
What conditions are necessary for successful diffusion?
Asked in Osmosis
How osmosis and diffusion are alike?
Both are passive processes, occurring without any input of energy. Substances diffuse down their concentration gradients; although molecules move randomly, in all directions, the net movement will be from an area of higher concentration toward an area of lower concentration. Osmosis is a specific case of diffusion. The term refers to the diffusion of water molecules.
Asked in Genetics, Cell Biology (cytology)
What is the role of a membrane in establishing a concentration gradient?
The membrane serves as both an insulator and a diffusion barrier to the movement of ions. Ion transporter/pump proteins actively push ions across the membrane to establish concentration gradients across the membrane, and ion channels allow ions to move across the membrane down those concentration gradients,
Distinguish between diffusion and active transport?
Diffusion: When the molecules are highly concentrated at part and lower concentrated at another part they move from high concentration to low concentration besides it`s a physical process. Active transport: Passage of ions or other thing from low concentration to high concentration against concentration gradients and it`s chemical process needs energy.
Asked in Example Sentences, Osmosis
What is a sentence with the words diffusion and osmosis?
Osmosis is the mechanism by which diffusion across a cell membrane occurs when there is a concentration gradient from one side of the membrane to the other. Osmosis and Diffusion are extremely similar because they both involve molecules moving from a high to low concentration to reach equilibrium. Diffusion and osmosis are the same in that they both move down their gradients to cause substances to be evenly distributed.
What does the word facilitated mean in facilitated diffusion?
Asked in Genetics
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.