PO4 = a group consisting of a phosphorus and 4 oxygen molecules that makes up the hydrophilic portion of a cell membrane

a solution that contains less solute (more solvent) than a solution to which it is compared

a solution that contains more solute (less solvent) than a solution to which it is compared

two solutions containing equal amounts of solvent and solute

an organic molecule made up of amino acids found in the cell membrane that helps transport medium sized molecules through a cell membrane

concentration gradient

the percent difference in amount of solute between two substances

movement of molecules across a membrane from an area of low concentration to high concentration (against the concentration gradient) that requires the addition of energy from ATP

the movement of molecules across a membrane from an area of high concentration to low concentration (hypertonic to hypotonic) that does not require the input of additional energy, examples include osmosis and diffusion

a protein in a cell membrane that allows the movement of positively or negatively charged atoms to move into or out of the cell

a form of active transport, the taking in of a large molecule into a cell by the process of the cell membrane wrapping around the molecule, creating a transport vesicle, that will then release the molecule into the cell

a form of active transport, the release of large molecules (or large amounts of molecules) from the inside of a cell to the outside by the use of the cell membrane wrapping around the molecules and making a vesicle to export them

a membrane bound sac that contains materials involved in transport of the cell.

prefix that means inside or into

prefix that means outside or external

name of the currently accepted model of cell membrane structure, which includes the phospholipid bilayer and different proteins

an organic compound made up of amino acids and responsible for most functions in living things

a lipid that helps hold the lipid tails of the phospholipids together in the cell membrane

selectively permeable

allows some but not all substances to pass through

using endocytosis or exocytosis to move groups of molecules through the cell membrane

a hydrophilic PO4 with two hydrophobic fatty acid tails that are found in a double layer and make up the cell membrane

sodium-potassium pump

protein responsible for a type of active transport only in animal cells that moves 2K+ into and 3Na+ out of the cell

type of molecules (sugars) that extend outward from a cell membrane and function to help recognize molecules and attach cells together; also responsible for short term storage of energy

facilitated diffusion

passive transport that requires the help of a protein for a molecule to pass through the cell membrane

passive transport of a very small molecule or atom that can fit between the phospholipids of a cell membrane without the use of a protein

Biology - Cell Transport and Membrane Structure Flashcards

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36 questions

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1.

FLASHCARD QUESTION

Front

concentration

Back

a measure of how much of a given substance is mixed with another substance

2.

FLASHCARD QUESTION

Front

diffusion

Back

passive transport of solute from high to low concentration

3.

FLASHCARD QUESTION

Front

equilibrium

Back

means there is a balance of solute/solvent in a solution both inside and outside of a cell; passive transport occurs until this is reached

4.

FLASHCARD QUESTION

Front

osmosis

Back

passive transport of water from high to low concentration

5.

FLASHCARD QUESTION

Front

semipermeable membrane

Back

a membrane that allows certain substances to pass through but does not allow the passage of other materials

6.

FLASHCARD QUESTION

Front

solute

Back

a substance that is dissolved in another substance to form a solution

7.

FLASHCARD QUESTION

Front

solvent

Back

a liquid that dissolves a solute to form a solution; most often water in biology

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