Plasma Membrane Terms

45 terms by joshy800

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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)

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