WorksheetsCell Membrane Homeostasis
Total questions: 15
Worksheet time: 15mins
What is a concentration gradient?
When there is a difference in concentrations between two areas of a solution/two sides of a membrane
Where there is a change in concentration over a period of time between two sides of a membrane
A gradient, or sloped line, showing how concentration decreases over time
A gradient, or sloped line, showing how concentration increases over time
Active transport is transport that requires...
Sodium ions
Energy
Force
Diffusion
Which method of transport is used by iron ions?
Diffusion
Facilitated Diffusion
Endocytosis
Exocytosis
What does a cell need to transport particles by active transport?
Sun
Wind
Energy
Channels
Lipid tails are...
Hydrophobic
Hydrophilic
When looking at the cell membrane, where are the lipid tails located?
Inner part of the bilayer
Outer part of the bilayer
At the end of the bilayer
Goes through each end of the bilayer
Osmosis is the diffusion of __________.
water
glucose
air
passive transport
A person should never drink salty water because their cells would
shrink
expand
An ISOTONIC solution has a(n) ______________ concentration of solute (dissolved stuff) than inside the cell.
lower
equal
higher
A HYPOTONIC solution has a ______________ concentration of solute (dissolved stuff) than inside the cell.
lower
equal
higher
What type of solution is this cell in?
Isotonic
Hypertonic
Hypotonic
diffused
What type of solution is this cell in?
Isotonic
Hypertonic
Hypotonic
diffused
Which of the following best describes the role of the cell membrane in maintaining homeostasis?
A) It acts as a barrier to all substances, preventing any exchange with the environment.
B) It selectively allows substances to enter and exit the cell, maintaining a stable internal environment.
C) It only allows water to pass through, regulating the cell's hydration.
D) It actively pumps all nutrients into the cell, regardless of concentration.
What would happen to a cell if its membrane became impermeable to ions?
A) The cell would maintain its normal function without any changes.
B) The cell would become hyperactive due to excess ion accumulation.
C) The cell would be unable to maintain its electrochemical gradient, affecting processes like nerve impulse transmission.
D) The cell would burst due to osmotic pressure.
In an experiment, a cell is placed in a solution and begins to swell. What can be inferred about the solution's tonicity relative to the cell?
A) The solution is isotonic to the cell.
B) The solution is hypertonic to the cell.
C) The solution is hypotonic to the cell.
D) The solution has no effect on the cell's tonicity.
