Transport of Water Through a Plant

Question 1

What is root pressure?

Answer 1

Water moves into xylem in roots, hydrostatic pressure increases.
Water forced up xylem by hydrostatic pressure.

Question 2

What is the transpiration pull?

Answer 2

Water molecules held together by cohesion.
Creates long continuous column of water.
As water evaporates put stomata it creates tension.
Tension pulls column up the plant.
Called Cohesion-Tension theory.

Question 3

What is capillary action?

Answer 3

Water molecules H bond with polar lignin molecules.
Forces of attraction can help pull water ul sides of vessel.