PORTAGE LEARNING COMPLETE
QUESTIONS AND VERIFIED
ANSWERS
◉ cholesterol. Answer: stabilizes the membrane in temperature or pH
changes
◉ transport protein. Answer: moves substances or wastes through the
plasma membrane
◉ glycolipid. Answer: A phospholipid covalently attached to a
carbohydrate
◉ glycoprotein. Answer: a membrane protein covalently attached to a
carbohydrate
◉ receptor protein. Answer: molecule in the plasma membrane that
binds specific signal molecules, which causes the cell to respond
◉ enzyme. Answer: A type of protein that speeds up a chemical
reaction in a living thing
◉ diffusion. Answer: Movement of molecules from an area of higher
concentration to an area of lower concentration.
, ◉ facilitated diffusion. Answer: Movement of specific molecules across
cell membranes through protein channels
◉ osmosis. Answer: Diffusion of water through a selectively permeable
membrane
◉ hypertonic. Answer: when comparing two solutions, the solution
with the greater concentration of solutes
◉ hypotonic. Answer: when comparing two solutions, the solution with
the lesser concentration of solutes
◉ isotonic. Answer: when the concentration of two solutions is the
same
◉ active transport. Answer: Energy-requiring process that moves
material across a cell membrane against a concentration difference
◉ exocytosis. Answer: Process by which a cell releases large amounts of
material
◉ endocytosis. Answer: process by which a cell takes material into the
cell by infolding of the cell membrane