Cell Transport 1
What does the term "selectively permeable" mean?
only letting some things through
equilibrium
a form of diffusion that involves the movement of water across a cell membrane
osmosis
If the inside of cell contains 23% water and the outside of the cell contains 57% water, which direction will water move in order to reach equilibrium?
into the cell
If the inside of a cell is 46% water and the outside of the cell is 46% water, what is the tonicity?
isotonic
Type of passive transport used by oxygen and carbon dioxide (gases).
diffusion
The form of energy that cells use during active transport
ATP
During simple diffusion, substances pass between the _____________ of the cell membrane
phospholipids
If the inside of a cell contains 55% solute and the outside is composed of 25% solute, what are the percentages of water inside and outside?
inside water : 45%
outside water : 75%
Inside of cell : 75% salt, 25%water
Outside of cell: 70% salt, 30% water
Which way does water move and what is the name of the solution ?
Into cell
hypotonic
List the three main parts of a cell membrane.
phospholipids, proteins, cholesterol
If a turgid plant is placed into a solution and the plant begins to wilt, the solution is called _______________.
Hypertonic
____________ transport requires energy.
active transport
A type of solution in which the solvent and solute percentages are the same inside and outside of the cell
isotonic
Inside of cell: 90% glucose
Outside of cell: 95%glucose
In which direction does osmosis occur and what type of solution is this?
out of the cell
hypertonic
During Passive transport, substances move across the cell membrane from _______ concentration to ______ concentration.
Low
Function of the cell membrane.
Control what enters and leaves the cell.
During active transport, substances move from ________concentration to __________ concentration.
low
high
Solutions in which water must move into the cell to reach equilibrium are known as __________
hypotonic
_______________ are areas in the cell membrane that allow larger molecules to pass through
channel proteins
___________ is the process of a cell releasing waste by pushing a vesicle through the cell membrane.
exocytosis
Water uses special proteins called ________ to move through the membrane. This is a type of _________ transport.
aquaporins; passive
The heads of a phospholipid are ___________, meaning they are attracted to water.
hydrophilic
Solutions in which the solute percentage is greater outside the cell are known as _________
hypertonic
__________ is the process in which a cell engulfs a large substance by wrapping the membrane around it and taking it in.
endocytosis