13.4.1 Transport in Angiosperms: Transpiration

Question 1

Transport in Angiosperms: Transpiration

Answer 1

• To draw in water, plants undergo transpiration, the process by which water is drawn up through the plant body and evaporated from the leaves.
• Adhesion, cohesion, and tension are physical properties of water that allow it to travel great vertical distances within plants.

Question 2

Transpiration

Answer 2

• the process by which water is drawn up through a plant and eventually evaporated from the leaves. The sun’s heat drives transpiration, which provides the force to raise water and ions from the roots up through the plant body

Question 3

note

Answer 3

• This cross-sectional view of a leaf to the left illustrates the path of water out of the plant. Water diffuses out of the xylem and into the air spaces of the mesophyll and exits as water vapor through stomata, small openings in the lower epidermis of the leaf.
• Several properties of water facilitate transpiration. The strong adhesion of water to the hydrophilic walls of the xylem vessels allows water to oppose gravity as it travels up the xylem. Hydrogen bonding provides the strong cohesion of water molecules to each other, allowing a continuous column of water to flow up through the xylem. As water is evaporated out of the stomata from the mesophyll, tension develops in the remaining water, drawing it up and out of the xylem.

Question 4

Loss of water through plant leaves is referred to as

Answer 4

• transpiration

Question 5

Plants can lose a tremendous amount of water through transpiration. What provides the major driving force for the replacement of water in most plants?

Answer 5

• tension

Question 6

TACT is the acronym that refers to the process by which plants maintain their water distribution. The first T stands for transpiration. What do the other 3 letters stand for?

Answer 6

• adhesion, cohesion, tension

Question 7

Which of the following physical properties does not assist in the movement of water through a plant?

Answer 7

• gravity

Question 8

True or false?

Translocation is the loss of water vapor from the leaves of the plant.

Answer 8

• false

Question 9

Which of the following influence both the cohesive and adhesive properties of water?

Answer 9

• its polarity

- its ability to form hydrogen bonds