BIO120 CHP3

regulates movement of materials into and out of the cell

PLASMA MEMBRANE

the environment outside of the plasma membrane is most appropriately referred to as _____

EXTRACELLULAR

main components of the plasma membrane

PROTEINS, LIPIDS, CARBOHYDRATES

have a hydrophilic head and hydrophobic tails

PLASMA MEMBRANE PHOSPHOLIPIDS

the predominant lipid in the cell membrane is a

PHOSPHOLIPID

the fluid-mosaic model of the plasma membrane suggests that…

…the membrane is neither rigid nor static in structure

membrane proteins that extend into the lipid bilayer

INTEGRAL PROTEINS

ions or molecules move in opposite directions

ANTIPORT

the plasma membrane is selectively permeable. this means…

…only certain substances can pass through it

the distribution of odor throughout the house is an example of

DIFFUSION

in the process of diffusion, net movement of substances is always from a region…

…of higher concentration to a region of lower concentration

what will increase the rate of diffusion

INCREASE OF TEMPERATURE

the movement of a substance from an area of high concentration to an area of lower concentration is called…

…diffusion

the diffusion of water across a selectively permeable membrane

OSMOSIS

a red blood cell that is places in a hypertonic solution

LOSES WATER

active transport…

…requires ATP

involves ingestion of liquids rather than particles

PINCYTOSIS

cannot move substances out of a cell

PHAGOCYTOSIS

the bulk uptake of material by the formation of a vesicle

ENDOCYTOSIS

cytoplasm is found…

…outside the nucleus but inside the plasma membrane

responsible for protein synthesis

RIBOSOMES

cells that lack ribosomes cannot…

…engage in protein synthesis

may or may not have ribosomes attached

ENDOPLASMIC RETICULUM

endoplasmic reticulum with ribosomes attached to it

ROUGH ER

packages materials for secretion from the cell

GOLGI APPARATUS

destruction of nonfunctional organelles

LYSOSOMES

what organelle produces mist of the cells energy

MITOCHONDRION

a molecule binds to a specific protein on the cell surface and triggers vesicle formation and endocytosis

RECEPTOR-MEDIATED ENDOCYTOSIS