Chapter 35: Water and Sugar Transport in Plants

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Surface tension

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18 Terms

1

Surface tension

________ is a force that exists among water molecules at an air- water interface.

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2

Cohesion

________ is molecular action among like molecules, such as the hydrogen bonding that occurs among molecules in water.

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3

Casparian strip

The ________ does not affect water and ions that move through the plastic route.

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4

Adhesion

________ is a molecular attraction among dissimilar molecules.

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5

Endodermal cells

________ are tightly packed and secrete a narrow band of wax called the Casparian strip.

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6

Phloem

________ consists largely of two cell types, sieve- tube elements, and companion cells.

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7

vascular plants

In ________, a source is a tissue where sugar enters the phloem; a sink is a tissue where sugar exits the phloem.

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8

movement of ions

The ________ and water into the root xylem is responsible for the process known as root pressure.

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9

sieve

They are connected to one another, end to end, by perforated ________ plates.

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10

Sieve tube elements

________ lack nuclei and most other organelles.

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11

Casparian strip

The ________ blocks the apoplastic route by preventing water from moving through the walls of endodermal cells and into the vascular tissue.

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12

In this case, the water interacts with a solid substrate

such as the glass walls of a capillary tube or the cell walls of tracheids or vessel elements-through hydrogen bonding

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13

water potential

indicate the potential energy that water has in a particular environment compared with the potential energy of pure water at room temperature and atmospheric pressure

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14

solute potential

tendency for water to move in response to differences in solute concentrations is determined by the ____.

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15

Well pressure

The force exerted by the wall

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16

turgor pressure

As water moves into the cell, the pressure of the fluid contents inside the cell

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17

suberin

forms a waterproof barrier where endodermal cells contact each other

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18

root pressure

Movement of ions and water into the root xylem is responsible for the process known as ___.

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