water potential Flashcards

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1
Q

water potential

A

. free energy per mole of water

predicts which way water diffuses

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2
Q

water potential is based on what two factors

A

solute potential and pressure potential

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3
Q

solute potential

A

potential energy created by solute concentrations, water tendency to move toward hyper-tonic areas

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4
Q

pressure potential

A

potential energy created by pressure

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5
Q

Free energy of Water & water concentrations is based on

A

free water

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6
Q

what water is not free

A

Water that is H-bonded to solutes is not free

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7
Q

more free water means

A

more free energy = higher ψ

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8
Q

water moves from

A

Water moves from high free water areas to low free water areas

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9
Q

higher solute means

A

less free water

less water potential

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10
Q

solute potential of distilled water is

A

zero

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11
Q

solute potential is based on

A

-i

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12
Q

solute potential is neg or pos

A

negative

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13
Q

water flows toward more neg or pos

A

negative

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14
Q

negative pressure =

A

tension

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15
Q

positive pressure =

A

turgor pressure/osmotic pressure

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16
Q

negative pressure example

A

water evaporates from leaves creates negative

pressure that pulls more water up from roots.

17
Q

crenation

A

caused by water leaving creates tension

18
Q

normal cell

A

isotonic solution

equal water potential

19
Q

osmotic pressure

A

created as cell swells

20
Q

lysis

A

cell membrane breaks

21
Q

pressure potential in an open container

A

0

22
Q

pressure potential in animal cell is — and why

A

0, no cell wall so no turgor pressure

23
Q

formulas are found on

A

formula sheet for test

24
Q

Plasmolyzed

A

Plant cell

Water moves out and it shrinks