Download Common Assessment #3 Review Sheet Why is the plasma

Common Assessment #3 Review Sheet
Why is the plasma membrane important to the cell? What does it maintain?
Explain how proteins and lipids are used by the cell membrane.
What are the three types of passive transport?
What is selective permeability (semi­permeable)?
Which type of passive transport only applies to water?
What is active transport? How are active and passive transport different?
What does it mean to “move down the concentration gradient”?
Passive transport is always from _______________ to _______________ concentration.
Active transport is always from _______________ to _______________ concentration.
If a plasma membrane was twice as thick as normal, would it be easier or more difficult for
the molecules to move across the membrane of a cell?
Osmosis can cause the cell to swell, shrink, or stay the same size. What type of solution
and solute concentration would need to occur for each of these situations to happen?
What can affect the rate of passive transport?
What is cell communication?
What is needed for cell communication to happen?
Draw an example of a cell receptor that is specific to a certain molecule.
What is the cell communication process that regulates blood sugar in humans?
What is fight or flight? How does cell communication regulate fight or flight response within
the body?