Unit 3: Cell Membrane, Structure, and Transport exam question and answers Practice questions for this set Terms in this set (49) Channel Protein A membrane protein, specifically a transport protein, that has a hydrophilic channel that certain molecul

Unit 3: Cell Membrane, Structure, and
Transport exam question and answers


Practice questions for this set

Terms in this set (49)

Channel Protein A membrane protein,
specifically a transport
protein, that has a hydrophilic
channel that certain molecules
or atomic ions use as a tunnel.
Carrier Protein A membrane protein,
specifically a transport
protein, that holds onto
molecules and changes their
shapes in a way that shuttles

, them across the membrane.
Passive Transport Movement of substances
through a cell membrane
without the use of cellular
energy; includes diffusion,
osmosis, and facilitated
diffusion.
Energy-requiring process
that moves material across
Active Transport
a cell membrane against a
concentration difference
Movement of molecules from
an area of higher concentration
Diffusion
to an area of lower
concentration.
Diffusion of water through a

Osmosis selectively permeable
membrane



Tonicity The ability of a solution to
cause a cell to gain or lose
water; depends partly on
concentration of no
penetrating solutes relative to
inside of cell.