Essays Tagged: "Water potential"

Practical assesment about biology: To determine the water potential of potato tuber cells

OSMOSISAimTo determine the water potential of potato tuber cells.Background knowledgeOsmosis is defined as the movement of wate ... s.Background knowledgeOsmosis is defined as the movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane. Osmosis ... of lower water potential through a partially permeable membrane. Osmosis is considered in terms of water potential and solute potential.Water potential is a measure of the kinetic energy of water mol ...

(14 pages) 125 0 3.9 Feb/2004

Subjects: Science Essays > Biology

Finding the concentration of a Potato cell.

osis and different concentrations of sucrose solution.Background informationOsmosis is diffusion of water across a partially permeable membrane. It moves from a solution with less solute concentration ... less solute concentration (high water potential) to a solution with more solute concentration (low water potential). The one with a high water concentration is called a hypotonic solution and the low ...

(12 pages) 54 0 5.0 May/2004

Subjects: Science Essays > Biology

To investigate how concentration effects osmosis on potato chips.

I have been asked to investigate the effect of osmosis on potato chips. Osmosis is the diffusion of water from a lower concentration of solute to a higher concentration of solute, through a membrane.I ... a higher concentration of solute, through a membrane.I have chosen to investigate the effect of the water potential/concentration of solution on potato chips. This means that I will put potato chips i ...

(11 pages) 31 0 2.3 Dec/2004

Subjects: Science Essays

Transpiration AP Lab

TranspirationAP LabOverviewIn this lab you will:1. apply what you leaned about water potential from Lab 1 (Diffusion and Osmosis) to the movement of water within the plant,2. ... s by observing sections of tissue.ObjectivesBefore doing this lab you should understand: how water moves from roots to leaves in terms of the physical/chemical properties of water and forces pr ... leaves in terms of the physical/chemical properties of water and forces provided by differences in water potential; the role of transpiration in the transport of water within a plant; and ...

(8 pages) 36 0 1.0 May/2005

Subjects: Science Essays > Biology

Explain why the concentration of water in cells should be maintained within a narrow range for optimal function.

Water in cells should be maintained in narrow range of concentration for optimal function.What happe ... l in a hypotonic solution... (Solution with less salt concentration).Osmosis is the net movement of water molecules from a region of high concentration to a region of their low concentration through a ... entration to a region of their low concentration through a selectively permeable membrane.Therefore water molecules move from external watery environment to the cell. This is known as endosmosis.If a ...

(3 pages) 19 0 3.0 Oct/2005

Subjects: Science Essays > Biology

Water Potential of a Potato.

Investigating the Water Potential of a Potato.I have been asked to investigate the water potential of a potato. During ... a value for, as it is a pressure value (kPa).Osmosis is a special form of diffusion involving only water molecules. It is defined as "The passage of water from a region of high water potential to a r ... r potential to a region of low water potential through a partially permeable membrane"Definition of Water Potential.The potential for water to move across a selectively permeable membrane, where the o ...

(6 pages) 21 0 3.0 Oct/2005

Subjects: Science Essays > Biology

Xylem.

Transport of water (and ions) up the plant. Also gives strength to the plantTranspiration*The transpiration strea ... he plant. Also gives strength to the plantTranspiration*The transpiration stream is the movement of water from the roots of the plant up the steam to the leaves. Water moves into the plant roots by os ... to move across the cells of the roots to the xylem in the centre. There is a continuous gradient of water potential from water in the soil to the cells in the centre. The water in the soil has a highe ...

(1 pages) 590 0 0.0 Dec/2005

Subjects: Science Essays > Biology

How Osmosis Affects The Weight Of Potato Chips

g affects Osmosis in potato tissue.Background Scientific Information: In Osmosis is the movement of water from a place of high water concentration to a place of low water concentration through a parti ... concentration through a partially permeable membrane. This osmosis movement will continue until the water potential on both sides of the ppm is balanced. When a potato chip is put in plain water, it w ...

(7 pages) 43 1 4.6 Feb/2006

Subjects: Science Essays > Biology

Osmosis Coursework

Investigating the water potential of Potato tissue.Introduction:In this investigation I aim to discover the water pote ... the line of best fit crosses the x-axis (concentration of sucrose solution). This will give me the water potential of the potato tissue, i.e., the point at which there is no increase or decrease in m ... es.* Six test tubes.* A test tube rack.* A ceramic cutting tile.* A sharp cutting knife.* Distilled water.* Sucrose concentration 1 Mole.* A balance to measure mass.* A stop watch.Notes:* The cork bor ...

(12 pages) 49 0 3.4 Mar/2006

Subjects: Science Essays > Biology

The three theories of transport in the Xylem

parenchyma cells; and conducting vessels.The xylem vessel has two main functions:* Xylem transports water and dissolved ions from the root system to the stem.* The lignified thick-walled xylem cells s ... alled xylem cells strengthen the stem.There are three theories in which the xylem vessel transports water around the plant:CapillaritySpontaneous movement of water up narrow xylem vessels. The movemen ...

(2 pages) 22 0 3.0 Jun/2006

Subjects: Science Essays > Biology

Osmosis Investigation

? When a dilute solution is separated from concentrated solution by a partially permeable membrane, water diffuses across the membrane from the dilute side to the concentrated side. This process is ca ... ncentrated side. This process is called Osmosis.A partially permeable membrane is porous but allows water to pass through it more rapidly than dissolved substances. Since dilute solutions contain more ...

(6 pages) 4 0 0.0 Oct/2001

Subjects: Science Essays > Biology

Transpiration in Plants

Transpiration is the process that allows plants to release H20 in the form of water vapor into the atmosphere. This process mostly occurs during the time the stomata, the microsc ... , are open for the passage of CO2 and O2. Transpiration plays a huge role for plants, as 90% of the water that enters the plant is through transpiration. It also allows the plant to receive key nutrie ... d minerals in order to survive. By transpiring, or evaporating, it causes the plant to suck up more water from its roots, causing a constant flow of water through the plant, which is optimal for survi ...

(5 pages) 24 0 5.0 Sep/2007

Subjects: Science Essays > Biology > Plant Biology

Osmosis

Osmosis is the movement of water from an area of high concentration to an area of low concentration across a semi permeable mem ... ane is placed between two solutions. In this biological systems context, osmosis is the exchange of water between the potato cell and the surrounding medium of varying sucrose concentrated solutions, ... ucrose concentrated solutions, with the plasma membrane being the semi- permeable membrane. Because water molecules have kinetic energy, they are constantly moving around in gaseous or liquid form, mo ...

(3 pages) 2 0 0.0 Sep/2014

Subjects: Science Essays