Diffusion is the process wherein the molecules move from a region of higher concentration to a region of lower concentration down the concentration gradient.
Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration whereas osmosis is the movement of a solvent such as water from an area of low solute concentration to an area of high concentration...
into pore and throat size distributions as a natural outcome of producing a pore network model. It also offers a powerful suite of advanced models for rock property analysis and simulations to obtain properties such as absolute permeability, formation factor, thermal properties...
Cell transport is a biological process through which materials pass into and out of cells, crossing the membrane or “outer wall” in the process. It happens in almost all organisms, and is an important part of cell health; it allows nutrients to come in and waste to go out, for one th...
Explain what happens when a wave is said to shoal. Why is the R wave so much higher than the P wave? What are sea waves and tides? What causes them? Distinguish among a forced wave, standing wave and progressive wave. Also provide an example of each. ...
What happens in the phloem? What is the role of transpiration in plants? Trees transport their nutrients from roots to leaves through what? What neurotransmitter causes muscle contraction? What is the primary cause of diffusion? How does the vascular cambium give rise to the xylem? How are cell...
Opinion polls are now beginning to show an unwilling general agreement that, whoever is to blame and whatever happens from now on, high unemployment is probably here to stay. This means we shall have to find ways of sharing the available employment more widely.But we need to go further. We...
The existence of certain substances obstructs the activity of a particular enzyme. It happens when the inhibitor is bound to the enzyme's active site, preventing the substrate's attachment and slowing down the process. pH Enzymes are extremely sensitive to pH changes and can only operate within ...
Osmosis is a passive process and happens without any expenditure of energy. It involves the movement of molecules from a region of higher concentration to lower concentration until the concentrations become equal on either side of the membrane. ...
What happens to epidermal cells during keratinization? Phospholipids are amphipathic. Explain what this means. What happens when guard cells are turgid? What are turgid and flaccid cells? What effect does a semisolid medium have when growing cells?