Chapter 4 Test

Chapter 4, Section 1: Passive Transport

    1. Define diffusion.

    2. Define Osmosis.

    3. Be sure to know the terms Hypotonic, Hypertonic and Isotonic.  Water flow from Hyptonic to Hypertonic!

    4. Which part of a phospholipid is hydrophobic? hydrophillic?

   5. Facilitated diffusion involves carrier proteins.  What types of molecules require facilitated diffusion?

   6.  Name the three proteins found on the surface of cells.

Chapter 4, Section 2: Active Transport

    1. What is the difference between active and passive transport?

    2.  What is the difference between exocytosis and endocytosis?