Download 6.3 Reading Guide

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6.3 Membranes regulate the traffic of molecules
Reading Guide
1) Define the following key terms:
DiffusionEquilibriumVesicle2) The passive transport of water across a selectively permeable membrane is called
3) The solution with a higher concentration of solute is said to be hypertonic.
What does “hyper” mean?
4) The solution with the lower solute concentration is said to be hypotonic
What does “hypo” mean?
5) Solutions in which the concentrations of solute are equal are said to be isotonic
What does “hyper” mean?
6) What role does a cellular membrane play in passive transport?
7) Distinguish between hypertonic, hypotonic, and isotonic solutions, and give an
example of how each affects an animal cell.
Solution
Hypertonic
How can it affect an animal cell
Hypotonic
Isotonic
8) Explain the difference between exocytosis and endocytosis
Exocytosis:
Endocytosis:
9) What role does active transport play in cell function?
10) How do vesicles transport large molecules out of the cell?