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Glossary of the plasma membrane & cellular transport
Terms in this set (36)
The movement of substances across a plasma membrane from a region of low concentration; active transport expends cellular energy
The compound that stores the energy released
During cellular respiration
The random motion and collision of molecules in solution as observed by Scottish scientist Robert Brown in 1827.
A fibrous protein that lines the cytoplasmic side of coated pits
Identications in the plasma membrane that contains receptor proteins; coated pits from vesicles containing large essential substances inreceptor- meditated endocytosis
The difference in concentration between a region of high concentration and a region of low concentration
The movement of molecules or particles from a region of high concentration to a region of lower concentration
The continuous movement and collision of particles with no change in concentration
The movement of materials INTO a cell by vesicles fromed from the plasma membrane
The movement of materials OUT of a cell by vesicles formed from plaa membrane
A process by which certain molecules diffuse across a plasma membrane via transport proteins
An organic molecule consisting of a carbon chain and one or more carboxyl ( COOH) groups
Fluid - mosaic model
A model used to explaining components and properties of a plasma membran; the membrane includes a phosholipid bolster in which several types of proteins are embedded
lipid molecules to which simple sugars are attached
protein molecules to which simple sugars are attached
the maintenance of a relatively constant environment within a cell despite fluctuations in the environment surrounding the cell.
the property of being "water loving" hydrophilic compounds tend to form hydrogen bonds and are therefore easily dissolved in water.
the property of being "water hating" hydrophobic compounds do not dissolve in water
a solution in which the concentration of dissolved substances is GREATER than that of another solution.
a solution in which the concentration of dissoved substances is LESS than of that of another solution.
a solution in which the concentration of dissolved substances is equal to that of another solution
the diffusion of water across a selectively permeable membrane.
the change in pressure resulting from the flow of water in osmosis; the osmotic pressure is equal to the tendency of water to enter a solution due to a concentration gradient.
a process by which matreials move across a plasma membrane without the expenditure of cellular energy.
a molecule that consists of four oxygen atoms bound t a central phosphorus atom.
a lipid molecule consisting of a phosphate group - containing hydrophilic head linked to two hydrophobic fatty acid tails; the fundamental component of a plasma membrane.
the bilayer of phospholipid and protein molecules that surrounds the cytoplasm of cells
the shrinking of cytoplasm in a cell resulting from the loss of water by osmosis to a hypertonic solution in which the cell is placed.
the process of endocytosis that enables the cell to engulf large molecules such as hormones and large proteins; this process involves the binding of large molecules to receptors in coated pits.
the propery of a plasma membrane that allows some molecules to pass freely through the membrane while other molecules cannot.
proteins in the plasma membrane that enable materials to pass to and from a cell either by facilitated diffusion or active transport.
the internal pressure of a plant cell.
Active.... (quiz answer)
transport requires the cell to expand energy to move materials across its membrane
Sodium- potassium........ (quiz answer)
Nerve cells employ a ______________ pump, which keeps conditions inside the cell chemically different than conditions on the outside of the cell.
Exocytosis......... (quiz answer0
the method of moving large waste molecules outside of a cell by the formation of a vesicle is called______________
digestive enzymes......(quiz answers)
a food vacuole will fuse with a lysosome, which contains______ that break the food particles into smaller components.
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