2007-10-06 14:45:58 · 3 answers · asked by Azumi 2 in Science & Mathematics ➔ Biology
If I was to answer this question does it relate to osmosis, diffusion, active, or passive? If I discuss these, would I be off topic?
Help please.
2007-10-06 14:53:00 · update #1
Xylem sap, in plants, rises against gravity, driven by a gradient of water potential. Water flows from an area of high potential to an area of low potential. Water Potential is expressed in units of pressure: 1 bar is the pressure needed to push up a column of water 10 meters. 1 megapascal = 10 bars. Pure water has a potential of 0. Addition of pressure increases water potential. Addition of solutes decreases it.
2007-10-06 18:35:17 · answer #1 · answered by ATP-Man 7 · 0⤊ 0⤋
Water goes where it wants to go. If you are going to talk about water, use osmosis and diffusion. Passive transport doesn't need energy and it allows nutrients and other tiny materials to pass through the cell membrane into the cell by normal diffusion.
The other topics like active transport don't really involve water, because it involves other carriers.
2007-10-06 22:32:46 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Water potential has to do with diffusion, osmosis, and passive transport. You can translate water potential to "water concentration". A higher water potential is a higher water concentration. In osmosis, diffusion, and passive transport, more water travels from an area of higher concentration to lower concentration than the other way around.
2007-10-06 23:21:53 · answer #3 · answered by ecolink 7 · 0⤊ 1⤋