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28 Cards in this Set
- Front
- Back
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transport proteins
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proteins used to move molecules into or out of the cell
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selective channels
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Proteins that work to allow specific compounds into the cell through a channel
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chemiosmosis
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pumps protons across the mitochondrial inner membrane and ATP synthesis is driven by re entry of protons through the ATP synthesising protein complex.
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osmosis
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Diffusion of fluid through a semipermeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of fluid on both sides of the membrane
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water potential
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measure of solute concentration and pressure
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megapascals
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unit for water pressure
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tension
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A force tending to stretch or elongate something
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plasmolyze
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Shrinkage or contraction of the protoplasm away from the wall of a living plant or bacterial cell, caused by loss of water through osmosis
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turgor pressure
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pressure due to high water concentration
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turgid
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A force tending to stretch or elongate something
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aquaporins
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water specific transport proteins to increase osmosis
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tonoplast
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The cytoplasmic membrane that surrounds a vacuole of a plant cell
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symplast
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The intracellular compartment of plants, consisting of the cytosol of a large number of cells connected by plasmodesmata
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apoplast
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external to the plasma membrane and includes cell walls, xylem vessels etc., through which water and solutes passes freely and the symplast, the total cytoplasmic compartment
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bulk flow
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movement of fluid through xylem and phloem by pressure
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mycorrhizae
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The symbiotic association of the mycelium of a fungus with the roots of certain plants, such as conifers, beeches, or orchids.
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endodermis
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The innermost layer of the cortex that forms a sheath around the vascular tissue of roots and some stems.
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Casparian strip
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belt made of suberin wax in each endodermal cell of a plant root
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transpiration
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The act or process of transpiring, especially through the stomata of plant tissue
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cohesion
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The intermolecular attraction that holds molecules and masses together
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root pressure
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upward push of xylem sap from roots uptake of water
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guttation
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The exudation of water from leaves as a result of root pressure
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transpiration-to-photosynthesis ratio
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amount of water lost per gram of CO2 stored organicly
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circadian rhythms
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cycles of about 24 hours
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translocation
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the transport of dissolved material within a plant
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sugar source
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plant organ where sugar is produced
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sugar sink
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organ that uses or stores sugar
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transfer cells
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companion cells with outgrowths to increase tranfer abilities
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