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sport drinks have a lower water content but higher water suluble content than your body
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∙ 11y ago
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Do cell phones have potential energy?
Yes. If you drop them, the potential energy will convert to kinetic energy.
What is the function of vacoules?
A cell vacoules rides hippos and drinks pink lemonade at a quarter to three.
What is the name for stored energy in a cell?
Potential energy
What is the energy used in the solar cell?
gravitational potential energy
Is a fresh dry cell kinetic or potential energy?
it has kinetic energy..the!!
Would the water potential of a potato cell decrease or increase when it is allowed to dehydrate?
decreases it - no water then no water potential.
What happens to animal cell in a solution with high water potential?
Animal cells lack rigid cell wall. When an animal cell is placed in a solution with high water potential, the wanter enters the cell as cell membrane is freely permeable to water. As a result of continuously increasing water potential inside the cell, Cell membrane bursts and the cell is said to be lysed.
Why is the water potential of distilled water higher than the water potential of the cytoplasm of the cell?
distilled contain no solute. so, its water potential is constantly 0. plant cell carry out photosynthesis continuously to produce sugar. thus, cytoplasm of plant cell always contain solute that lower the water potential of cytoplasm.
What kind of energy does a cell phone charger use?
potential electrical energy
What is the new water potential of a plant cell of water potential 500kPa after immerse into pure water?
Water potential is the potential energy of water in a system (eg a solution or a cell) compared with pure water under the same conditions. The value of the water potential depends mainly on two factors: 1) The presence of dissolved solutes. Solutes dissolved in the water reduce the energy of the water molecules, and so lower the water potential. This happens because the solute molecules attract the water molecules and reduce their movement. The component of water potential due to solutes is called the solute potential of the solution. 2) The presence of an excess pressure, above that of normal atmospheric pressure. Pressure increases the movement of the water molecules and so increases their energy, thus increasing the water potential. The component of water potential due to pressure is called the pressure potential of the solution. The total water potential of a solution is the sum of the solute potential and pressure potential water potential = solute potential + pressure potential The pressure potential can be positive or negative. An additional pressure on the solution will be positive and increase the pressure potential. If the solution is subject to a reduced pressure (a negative pressure or suction) the pressure potential will be negative and will reduce the water potential. The solute potential is always negative and so always reduces the water potential. Pure water is given a water potential of zero (similar to the way in which the freezing point of water is given a value of 0o Celsius). So anything which reduces the energy of the water molecules (such as dissolving a solute) will reduce the water potential to below zero, and so will be negative. The movement of water depends on the difference in water potential between two systems eg two adjacent cells, or a cell and the surrounding solution. This difference is called the water potential gradient. Water will always move from the higher to the lower water potential ie down the water potential gradient. In osmosis, the two solutions involved are often at atmospheric pressure. In this case it is only the difference in solute concentration which determines the direction of water movement. Water moves from the dilute solution to the concentrated solution. The concentrated solution has a higher concentration of dissolved particles, and so has a lower solute potential than the dilute solution. Since the pressure potential is zero (no excess pressure), the water potential is equal to the solute potential. Water will therefore move from the higher water potential (ie the dilute solution) to the lower water potential (ie the more concentrated solution), down the water potential gradient. It is possible for the pressure potential to counteract the solute potential. For example, if a solute (eg salt) is added to pure water, the water potential will be reduced to a negative value. If the solution is then put under extra pressure eg in a syringe, the positive pressure potential can raise the total water potential above zero ie give it a positive value. This happens especially in plant cells, where the cell wall prevents an increase in volume of the cell. So if water enters by osmosis the extra water molecules cause the pressure inside the cell to increase. This intracellular pressure in a plant cell is called the turgor pressure. For more information see: http://en.wikipedia.org/wiki/Water_potential http://www.colorado.edu/eeb/courses/4140bowman/lectures/4140-07.html http://www.phschool.com/science/biology_place/labbench/lab1/watpot.html
Which way would water move if a cell is placed in salt water (a hyper tonic solution)?
The water potential of the outside solution would be lower than the water potential of the cell itself. Therefore, water would pass out of the cell by osmosis (as water moves from a region of higher water potential to lower water potential). An animal cell would shrivel and become crenated. In a plant cell, the cytoplasm would shrink and the cell membrane would come away from the cell wall. This is called plasmolysis and when complete, the cell is said to be flaccid.
How the cell obtain water without using energy?
The most common form of transport for water into and out of cells is normally through the process of osmosis.This is the diffusion of water molecules from an area of high water potential to low water potential, and therefore doesn't require energy.For example, if there is a higher concentration of water outside the cell as opposed to inside the cell, then water will diffuse into the cell across the partially permeable membrane to give a net gain of water inside the cell. This is because it is travelling down the water potential gradient. Therefore the cell will gain water without using energy.In the kidney, there is a structure called the nephron. Water is lost through ultrafiltration and needs to be gained back so that we do not waste the water. 65% of the water is diffused back into the blood stream through osmosis as the water potential is higher in the nephron than the surrounding blood capillaries. More water then diffuses out of the nephron into the surrounding cells of the kidney. This is achieved through the active transport (using energy) of ions out of the nephron into these surrounding cells. Ions are solutes thus the water potential of the cells is reduced while the water potential of the nephron is increased. As a result, more water diffuses by osmosis out of the nephron and remains in the body.
