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

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

Selectively Permeable

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

The relatively constant internal physical and chemical conditions that organisms maintain.

The process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated.

Facilitated Diffusion

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

The 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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Bio

Term	Definition
Cell Membrane	A thin, flexible barrier that surrounds all cells and regulates what enters and leaves the cell.
Lipid Bilayer	A flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings.
Selectively Permeable	A property of biological membranes that allows some substances to pass across it while others cannot; also called a semipermeable membrane.
Homeostasis	The relatively constant internal physical and chemical conditions that organisms maintain.
Diffusion	The process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated.
Facilitated Diffusion	The process of diffusion in which molecules pass across the membrane through cell membrane channels.
Osmosis	The 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: user-2018632

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