Transport in Plants Lecture 6 Botany

Front

Molecules are in ___________ motion

Back

CONSTANT

Front

Molecules move along a concentration gradient from _____ to ____ concentration.

This is what type of transport?

Back

High to Low

Passive Transport / Diffusion

Front

Molecules move from _____ to _____ concentration AGAINST concentration gradient

This is what type of transport?

Back

Low to High

Active Transport

Front

Define Equilibrium

How does temp. affect it?

Back

Molecules equally distributed throughout available space

As Temp. ↑ = Equilibrium Rate ↑

Front

Define Osmosis

Back

Diffusion of a solvent (usually water) through a semipermeable membrane

Front

Define Osmotic Pressure

Back

Pressure required to prevent osmosis

AKA Osmotic potential is balanced by the resistance of the cell wall.

Front

Define Pressure Potential (Turgor Pressure)

What is a turgid cell given this definition?

Back

Pressure that develops against walls as a result of water entering the cell

Turgid cell: Firm cell due to water gained by osmosis

Front

Water Potential of a cell = ???

Back

Osmotic Pressure + Pressure Potential

Front

Define Plasmolysis

Back

Loss of water through osmosis accompanied by shrinkage of protoplasm away from the cell wall

Front

In general, water ALWAYS moves from ____ H2O Potential --->

____ H2O Potential?

Back

High H2O potential (low solute) to Low H2O Potential (high solute)