thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell

flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings

selectively permeable

property of biological membranes that allows some substances to pass across it while others cannot; also called semipermeable membrane

relatively constant internal physical and chemical conditions that organisms maintain

facilitated diffusion

process of diffusion in which molecules pass across the membrane through cell membrane channels

diffusion of water through a selectively permeable membrane

when the concentration of two solutions is the same

when comparing two solutions, the solution with the greater concentration of solutes

when comparing two solutions, the solution with the lesser concentration of solutes

pressure that must be applied to prevent osmotic movement across a selectively permeable membrane

on or in a cell, a specific protein to whose shape fits that of a specific molecular messenger, such as a hormone

group of organs that work together to perform a specific function

group of tissues that work together to perform closely related functions

group of similar cells that perform a particular function

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Vocab BIO

Question	Answer
cell membrane	thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell
lipid bilayer	flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings
selectively permeable	property of biological membranes that allows some substances to pass across it while others cannot; also called semipermeable membrane
homeostasis	relatively constant internal physical and chemical conditions that organisms maintain
facilitated diffusion	process of diffusion in which molecules pass across the membrane through cell membrane channels
osmosis	diffusion of water through a selectively permeable membrane
isotonic	when the concentration of two solutions is the same
hypertonic	when comparing two solutions, the solution with the greater concentration of solutes
hypotonic	when comparing two solutions, the solution with the lesser concentration of solutes
osmotic pressure	pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
receptor	on or in a cell, a specific protein to whose shape fits that of a specific molecular messenger, such as a hormone
organ system	group of organs that work together to perform a specific function
organ	group of tissues that work together to perform closely related functions
tissue	group of similar cells that perform a particular function

Created by: Ajobarteh

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