Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BISC 111 > Water Relations > Flashcards

Water Relations Flashcards

1
Q

Name 4 reasons water movement in plants is important

A

Cooling; long distance of minerals, hormones, and sugars; leaf movement/curling, opening and closing of stomata; growth from elongation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the general equation for transpiration?

A

water loss / area * time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How does water exit the leaf into the air?

A

Through the stomata

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What comes into the cell to replace water thats leaving?

A

CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Whats another word for the epidermis?

A

Dermal tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the ground tissue?

A

The part of the plant containing the mesophyll cells where photosynthesis takes place, not the epidermis to vascular tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the two types of vascular tissue?

A

Xylem and Phloem

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the driving force for transpiration?

A

concentration gradient of water vapor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the more complicated equation for transpiration?

A

(concentration of water vapor internal - concentration external) / resistances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the three resistances to transpiration and which two are the most important?

A

S: stomatal resistance (small size, small apertures, low density)
B: boundary layer (waxy exterior, trichomes, wiggly surface)
I: internal resistance (packed interior / increased internal density) not as importane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are three types of boundary layer resistance?

A

Waxy exterior, trichomes, wiggly surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How does transpiration relate to temperature?

A

Increases until it plateaus
- increased ability for water to vaporize
- plants use it to cool down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How does transpiration relate to humidity?

A

Decreased transpiration with high humidity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the two factors that influence the concentration gradient (transpiration)?

A

Humidity and temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the four factors that influence resistance (transpiration)?

A

Leaf morphology, light, [CO2], wind

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How does wind influence transpiration?

A

Increased wind = more transp

17
Q

What’s up with cohesion and adhesion?

A

Water is attracted to itself and the walls of vascular system –> is pulled up by transpiration, which pulls water out of the soil and into the roots

18
Q

Does water move from high potential to low or vice versa?

A

Yes, high to low

19
Q

What is the equation for water potential?

A

Water potential = pressure potential + solute potential

20
Q

Does water move from areas of high pressure to low or vice versa?

A

Yes, high to low

21
Q

Does water move from areas with high solute concentrations to low or vice versa?

A

Vice versa

22
Q

Does water with high water potential or water with low water potential want to move more?

A

High water potential

23
Q

Does water with a bunch of solutes in it want to move?

A

No the water is busy

24
Q

Is the pressure potential inside a typical plant cell positive or negative? and what does this mean

A

Positive –> water wants to leave the cell

25
Q

What is turgor pressure?

A

The force inside the cell that pushes out against the cell wall

26
Q

What is wall pressure?

A

The force of the strong cell wall pushing back against turgor pressure

27
Q

Which is usually stronger, turgor or wall pressure?

A

They are equal

28
Q

How does the humidity of air influence the water potential of the air?

A

Increased humidity increases water potential

29
Q

Whats the difference between xylem and phloem?

A

Xylem transports aqueous things –> water, soluble nutrients

Phloem transports organic things –> sugars, proteins

30
Q

What are the 4 types of xylem vessel things we learned about?

A

Simple water conducting cells
First vascular tissues
Tracheids
Vessel elements

31
Q

Which types of xylem things provide the most structural support?

A

Tracheids and vessel elements

32
Q

Which of the xylem things is found in all vascular plants?

A

Tracheids

33
Q

Where are vessel elements found?

A

Gnetophytes and angiosperms

34
Q

What substance provides the structure in xylem thingies?

A

Lignin

35
Q

What is the disadvantage of simple water conducting cells? Where are they found current day?

A

Water has to move from cell to cell which is very slow, also no structural support. Found in mosses

36
Q

What is auxin?

A

A growth hormone in plants
–> initiates cell elongation

37
Q

What is a palisade cell?

A

The nicely lined up mesophyll cells in the middle of the leaf

BISC 111 (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions