Cell Membrane: Just Passing Through
Use the animation found at the link below to answer the following questions.
https://contrib.pbslearningmedia.org/WGBH/conv19/tdc02-int-membraneweb/i
ndex.html
(or Google “Cell Membrane Just Passing Through” and then Launch the
interactive)
1. Describe how each of the following molecules will be transported across
the cell membrane.
Method of
Transport
Oxygen
Carbon dioxide
Glucose
Potassium
Sodium
Water
Enzymes
Name of Protein
Involved (if
applicable)
Does the process
require energy?
2. What does a cell need oxygen for?
3. Carbon dioxide is a by-product of what?
4. Glucose enters the cell through facilitated di usion and does not require
energy. What keeps the glucose molecules from leaving the cell?
5. What is ATP?
6. Explain why there is a sodium/potassium pump (ie. what does the cell
need?). Also explain why this process requires ATP.