Moving Along
Movement across a cell membrane that does not require extra energy.
What is passive transport?
The diffusion of water through a selectively permeable membrane.
What is osmosis?
Movement across a cell membrane that requires extra energy to complete.
What is active transport?
The state of relatively constant internal physical and chemical conditions in a living cell.
What is homeostasis?
The process by which particles move from areas of higher concentration to areas of lower concentration.
What is diffusion?
The force produced by the movement of water driven by differences in solute concentration.
What is osmotic pressure?
The process by which a cell can release a large amount of material via a vesicle or vacuole.
What is exocytosis?
A group of similar cells that perform a particular function in a multicellular organism.
What is a tissue?
The process by which special proteins in the cell membrane act as carriers or channels for certain particles to cross the cell membrane.
What is facilitated diffusion?
The condition of a cell when the concentration of solutes is the same inside and outside of the cell.
What is isotonic?
The process by which a cell absorbs a particle by extending cytoplasm to engulf it.
What is phagocytosis?
A grouping of tissues that work together to complete a task.
What is an organ?
The point at which particles are equally distributed across a cell membrane.
What is equilibrium?
The condition of a cell where the solute concentration is higher outside the cell than inside the cell, causing the cell to shrink.
What is hypertonic?
Specialized proteins that actively pump small molecules and ions across a membrane, sometimes the opposite direction of diffusion.
What are protein pumps?
The part of a cell to which a chemical signal will bind.
What is a receptor?
A protein channel that allows the movement of water across a cell membrane.
What is an aquaporin?
The condition of a cell where the solute concentration is lower outside the cell than inside the cell, causing it to swell.
What is hypotonic?
The molecule that provides energy to drive motion of certain ions or molecules across the cell membrane, often the opposite direction of diffusion.
What is ATP
These hold cells tightly together in specific formations.
What are cellular junctions?