Transport of water in xylem

Question 1

How does water move?

Answer 1

from a high water potential to a low water potential

Question 2

What is the relationship between water potential and solute potential called?

Answer 2

Inversely proportional

Question 3

What is carbon dioxide used for?

Answer 3

Photosynthesis

Question 4

What is the oxygen produced during photosynthesis then used for?

Answer 4

Respiration

Question 5

What does organic mean?

Answer 5

the plant makes them themselves

Question 6

What does inorganic mean?

Answer 6

Comes fm the soil

Question 7

What are organic nutrients?

Answer 7

Plants product their own glucose

Question 8

What re some examples of organic nutrient?

Answer 8

Glucose and sucrose (proteins and sugars

Question 9

What are some examples inorganic ions?

Answer 9

Potassium and sodium

Question 10

What does xylem transport?

Answer 10

Water and inorganic ions

Question 11

What does phloem transport?

Answer 11

Organic minerals

Question 12

What is the general pathway of water?

Answer 12

Soil -> root -> xylem -> through root -> stem -> leaves (Stomata)

Question 13

What do root hairs do?

Answer 13

Absorb water by osmosis

Question 14

What type of water potential does soil have?

Answer 14

High

Question 15

What does the cell sap from root hairs contain?

Answer 15

Inorganic and organic proteins and sugars

Question 16

what type of water potential do root hairs have?

Answer 16

Low

Question 17

How are ions transported into root hairs?

Answer 17

Active transport

Question 18

What do xylem contain in the vessel?

Answer 18

Lignin

Question 19

What do lignin do?

Answer 19

• kill cells

- provide support and strength for the stem

Question 20

what is the vascular tissue made up of?

Answer 20

Xylem and Phloem

Question 21

what do root hair provide for the root?

Answer 21

INNCREASED SUFACE AREA

Question 22

What is cambium?

Answer 22

A waterproof layer

Question 23

What are. Meristem cells?

Answer 23

Plant stem cells

Question 24

Which. Has lower water potential xylem or root hairs?

Answer 24

Xylem

Question 25

name the 2 routes that water takes through the root.

Answer 25

• Apoplast pathway

- Symplast pathway

Question 26

What is the apoplast pathway?

Answer 26

Along the cell walls

Question 27

What is the symplast pathway?

Answer 27

Through the cytoplasm

Question 28

Which is usually the dominant pathway?

Answer 28

Symplast

Question 29

When is apoplast the dominate pathway?

Answer 29

When transpiration rates are high

Question 30

What is plasmodesma/ta?

Answer 30

Connect one cell cytoplasm to the next

Question 31

What are the 2 rolls of xylem?

Answer 31

• transporting water and dissolved mineral ions

- supporting the plant

Question 32

Why is the lignin strong?

Answer 32

It spirals

Question 33

What is cohesion?

Answer 33

Water molecules sticking together

Question 34

What is adhesion?

Answer 34

Water molecules sticking to the xylem walls

Question 35

Where is there low hydrostatic pressure?

Answer 35

At the leafs

Question 36

Why is there low hydrostatic pressure in the leafs?

Answer 36

Because water is leaving

Question 37

Where is there high hydrostatic pressure?

Answer 37

roots

Question 38

Why is there high hydrostatic pressure in the roots?

Answer 38

Because they’re getting water `

Question 39

What stops the xylem walls from collapsing due to the pressure difference?

Answer 39

Lignin

Question 40

What causes the tensions?

Answer 40

The pulling of water

Question 41

What will stop the pressure difference?

Answer 41

Air bubbles

Question 42

Where does the water go if there is air bubbles?

Answer 42

Through pits too the next xylem

Question 43

Where does capillarity happen?

Answer 43

In very narrow tubes

Question 44

Name the 3 theories for cohesion

Answer 44

• Diameter of tree trunks more narrow at night
• xylem being under pressure due to air inside
• Water doesn’t leak if there is a break