Name ___________________________________________________ Date __________________ Period
Cell Membrane and Homeostasis Study Guide
VOCABULARY




cell membrane
selective permeability
phospholipid
passive transport








osmosis
hypotonic
diffusion
isotonic
concentration gradient
hypertonic
active transport
Sodium-potassium pump
Draw a phospholipid. Label the three major parts.
Which part of a phospholipid is Hydrophilic? ______________________________________________
Which part of a phospholipid is hydrophobic? ______________________________________________
Why do the phospholipids surrounding the cell form a bilayer?
What is the function of Glycoproteins?
Draw a picture in the box below to represent selective permeability.
outside
inside
What is a concentration gradient?
What does it mean for a molecule to diffuse down a concentration gradient?
The higher the concentration of dissolved particles in a solution, the ___________the concentration of water molecules
in that solution.
Suppose you have three solutions with different concentrations of particles. Relative to the concentration of particles in
a cell, one solution is isotonic, one is hypertonic, and one is hypotonic. Use this information to answer the next two
questions.
Which solution has the highest concentration of particles?
Which solution has the highest concentration of water molecules?
The difference in the concentration of a substance from one location to another is a __________ __________.
People with excess energy are described as hyper. How does this relate to the meaning of hypertonic?
How is active transport different than diffusion?
How is active transport similar to diffusion?
List two characteristics that almost all transport proteins share.
List the key distinguishing feature of active transport proteins.
Refer to Figure 3.25 (book page 89) to draw a picture in the box below to represent active transport.
outside
inside
Most active transport proteins use energy from the breakdown of ___ .
A Sodium-Potassium Pump is used to moves sodium out of the cell, and potassium in. Explain how it can do this all at
the same time.
How does the cell membrane maintain homeostasis inside a cell.