Test 3 Review: Water and Solute Transport

Question 1

Transpiration

Answer 1

water transport in plants

Question 2

What structures form the water channels for transpiration?

Answer 2

Tracheary elements

Question 3

What other cells are involved in transpiration?

Answer 3

Root hairs
Endodermis
Vascular cylinder
Guard cells

Question 4

Translocation

Answer 4

nutrient transport in plants

Question 5

What is the overall direction of water transport?

Answer 5

Upwards

Question 6

What is the driving force of water transport in plants?

Answer 6

Cohesion of water molecules to each other
Adhesion of water molecules to walls of vessel element
Overall pull of evaporation from stomata

Question 7

What is the theory that explains the driving force of water transport in plants?

Answer 7

Cohesion-Tension theory

Question 8

What kind of pressure is associated with translocation?

Answer 8

Positive

Question 9

What kind of pressure is associated with transpiration?

Answer 9

Negative

Question 10

What is the overall direction of nutrient transport?

Answer 10

Down

Question 11

For translocation to occur, water must move into the sieve tube element cells in response to increased sugar content in those cells. Where does the water come from?

Answer 11

Xylem

Question 12

Why does the turgor pressure increase in the initial sieve tube element cells result in downward movement from that initial cell to others in the row?

Answer 12

Sieve tube elements are hydraulically connected, so pressure buildup is relieved by the photosynthate moving to next sieve tube element

Question 13

What is the theory that explains the movement of pressure between cells?

Answer 13

Münch Hypothesis / Pressure-Flow Hypothesis