Ch 36

Question 1

Not a function of the plasma membrane proton pump

Answer 1

Equalizes the charge on either side of the membrane

Question 2

A plant cell placed in a higher water potential (hypotonic) will

Answer 2

Gain water and become turgid

Question 3

Transport through cytoplasmic continuum connecting neighboring cells is called

Answer 3

Symplastic

Question 4

Bulk flow of xylem sap occurs as a result of

Answer 4

Root pressure and transpiration

Question 5

Root pressure is attributable to

Answer 5

Pumping of ions into the xylem

Question 6

Carries sugars from source to sink areas of a plant

Answer 6

Phloem

Question 7

Which of the following would tend to increase rate of transpiration

Answer 7

Higher stomatal density (more stomata per unit leaf area)

Question 8

The loading of sugars into sieve tube elements is an important process for

Answer 8

Translocation

Question 9

What contributes directly to the turbot pressure that opens stomata

Answer 9

Potassium accumulation in guard cells

Question 10

Plants take in ____ through their roots and ____ through their leaves

Answer 10

Oxygen

Carbon dioxide

Question 11

Mycorrhizae enhance plant nutrition mainly by

Answer 11

Absorbing water and minerals through fungal hyphae

Question 12

Which of the following is not part of the transpiration-cohesion-tension mechanism for the ascent of xylem sap

Answer 12

The active pumping of water into the xylem of roots

Question 13

Sugars move from leaves into the ____ of _____ by_____

Answer 13

Sieve tube elements
Phloem
Active transport

Question 14

What is the main cause of guttation in plants

Answer 14

Root pressure

Question 15

Main force by which most of the water within xylem vessels moves toward the top of a tree

Answer 15

Evaporation of water through open stomata

Question 16

Caspian strip

Answer 16

It ensures that all dissolves substances must pass through a cell membrane before entering the vascular tissue

Question 17

Chemiosmosis begins with the active transport of

Answer 17

Hydrogen ions out of cells

Question 18

Water potential of pure water

Answer 18

Zero

Question 19

A chemical interferes with the establishment and maintenance of proton gradients across the membranes of plant cells. All of the following processes would be directly affected by this chemical except

Answer 19

Transport of xylem sap

Question 20

_____ accumulation leads to water _____ and an increase in turgid pressure within guard cells that open stomata

Answer 20

K+

Gain

Question 21

Transport via the cell walls of neighboring cells

Answer 21

Apoplastic

Question 22

Movement of sucrose into phloem cells and the movement is nitrate into root cells occurs via

Answer 22

Cotransport with H+

Question 23

Which of the following is not a common adaptation for xerophytes

Answer 23

Very large thin leaves

Question 24

An increase in solute concentration will increase the water potential above zero

Answer 24

False