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45 terms

Plasma Membrane Terms

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phospholipid bilayer
double layer of phospholipids that make a cell membrane
plasma membrane
another term for cell membrane
hydrophobic
term that describes being chemically repelled by water
lipid
another word for fat
fatty acids
what the two hydrophobic tails of a phospholipid are composed of
transport (channel)
types of proteins that help move substances into and out of a cell
diffusion
passive type of movement of particles in which they randomly move from an area of high concentration to an area of low concentration
phosphate
PO4^-3
hydrophilic
term that describes being chemically attracted to water
cytoplasm (cytosol or hyacoplasm)
the watery substance inside a cell
facilitated diffusion
type of diffusion allowed by transport proteins that provide a pathway for molecules that have difficulty crossing the plasma membrane
polar
water and sugar molecules both have trouble crossing a plasma membrane because they are both
passive transport
types of molecular movements that do not require an input of energy
plasmolysis
shrinking of a cell due to a loss of water
diffusion
a cloud of smoke dispersing into the surrounding air demonstrates
endocytosis
when a cell uses its membrane to engulf surrounding particles, and forms vesicles in the process
plasmolysis
a carrot becoming rubbery by being saturated with salt water demonstrates
hypertonic
type of solution that has a higher concentration of solute than another solution
selectively permeable (semi-permeable)
word that describes a cell membrane's tendency to allow only certain materials into and out of the cell
vesicles
tiny packages of substances within a cell; like little bubbles produced by engulfing movements of the cell membrane
hypotonic
term that describes a solution that has a lower concentration of solute than other solution
hypertonic
salt water would be this compared to distilled water
dialysis tubing
material used in a science lab to simulate a plasma membrane
exocytosis
process in which materials are ejected from a cell using vesicles and the plasma membrane
equilibrium
the condition reached once concentrations balance on both the inside and outside of a cell
osmosis
the diffusion of water into (or out of) a cell across a semipermeable membrane
phagocytosis
endocytosis on a grand scale
diffusion
food coloring dropped into a beaker of water demonstrates this process
osmosis
"starch piggies" basking in iodine stimulates this process
isotonic
term that describes when concentrations of a solution are equal
active transport
when a cell needs to exert energy to move molecules or ions across a membrane
plasmolysis
if you were to drink salt water, your cells would undergo this
phagocytosis
when an amoeba uses its psuedopodia to engulf its prey
solvent
in a solution, the liquid that does the dissolving is the
solute
in a solution, the substances that are dissolved are the
phagocytosis
when a macrophage engulfs bacteria
hypotonic
compared to cytoplasm, distilled water is
solution
the combination of a solute dissolved in a solvent is a
hypotonic
red blood cells swell up when exposed to this kind of solution
glucose
a simple sugar the could enter a cell via facilitated diffusion
decalcification
removing of an egg shell by exposure to acetic acid
denaturation
changing a protein in such a way it no longer functions
invagination
during endocytosis, this is the first stage, when the cell membrane dents, inward to start forming a vesicle
lysosomes
organelles that carry enzymes that digest the particles brought in by phagocytosis in macrophages
pinocytosis
endocytosis of a liquid ("cell drinking" usually if)