Botany Exam 2 Ch. 10

24 terms by bmbaker30

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Solutes

the dissolved substance in a solution

Symplastic Transport

Movement of substances through the interior of cells (within the cytoplasm)

Apoplastic Transport

The movement of molecules within the cell walls throughout a plant.

Diffusion

Tendency of molecules to spread out spontaneously within the available space, from a region of higher solute concentration to a region of lower concentration.

Osmosis

Movement of water or other solvent across a selectively permeable membrane.

Osmotic Potential

Measurement of differing water's tendency to move across a membrane as a result of solute concentration

Hypertonic

Describing a solution with higher solute concentration than another.

Hypotonic

Describing a solution with with lower solute concentration than another.

Plasmolysis

A condition in which a plasma membrane shrinks away from its cell wall, caused by net flow of water out of the cell.

Adhesion

The attraction between different kinds of molecules.

Cohesion

Attraction between identical molecules; Causes water to have a high boiling point.

Source

a process by which energy or a substance enters a system

Sink

descend into or as if into some soft substance or place

Soil (solution)

The combination of water, dissolved mineral ions, and dissolved O2; source of macro- and micro- nutrients for plants.

Sand

The largest of soil particles, 0.02 to 2 millimeters in diameter.

Silt

Medium-sized soil particles, 0.002 to 0.02 millimeter in diameter.

Clay

The smallest soil particles, smaller than 0.002 millimeter in diameter.

Humus

partially decomposed organic matter; organic component of soil

Leaching

downward movement of minerals and humus in soils

Hydroponics

Soil-less gardening in which mineral nutrients normally supplied by the soil are mixed into a liquid solution used to water the plant roots.

Micronutrient

An essential chemical element, such as copper or zinc, used in small amounts by a plant.

Macronutrient

An essential chemical element, such as nitrogen or phosphorus used in large amounts for producing the body of the plant and for carrying out essential physiological processes.

Nitrogen Fixation

The conversion of nitrogen gas into nitrate or ammonium ions by soil bacteria.

Root Nodules

A structure on a root where nitrogen-fixing bacteria live.

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