Question

cell? what is membrane potential or polarity? 14. tonicity (2.8) define osmosis. create a chart and define hypotonic, hypertonic and isotonic. diagram and explain how water will move in each case. 15. water potential (2.8) what is water potential? give the equation and explain its

Explanation:

Osmosis is the diffusion of water across a semi - permeable membrane from an area of high water potential to an area of low water potential. In a hypotonic solution, the solute concentration outside the cell is lower than inside, so water moves into the cell causing it to swell. In a hypertonic solution, the solute concentration outside the cell is higher than inside, so water moves out of the cell causing it to shrink. In an isotonic solution, the solute concentration is the same inside and outside the cell, so there is no net movement of water. Water potential is the potential energy of water per unit volume relative to pure water. The equation for water potential is Ψ = Ψs+ Ψp, where Ψs is the solute potential and Ψp is the pressure potential. Membrane potential or polarity is the difference in electrical charge across a cell membrane, which is due to the unequal distribution of ions.

Answer:

Osmosis: Diffusion of water across semi - permeable membrane from high to low water potential.

Solution Type	Solute Concentration	Water Movement
Hypertonic	Higher outside cell	Out of the cell
Isotonic	Same inside and outside cell	No net movement

Water potential: Potential energy of water per unit volume relative to pure water, Ψ = Ψs+ Ψp.
Membrane potential/polarity: Difference in electrical charge across cell membrane due to unequal ion distribution.