Download Endosymbiosis and Evidence for Endosymbiosis

September 18, 2013
Endosymbiosis and Evidence for Endosymbiosis
September 18, 2013
Water Potential Problems
September 18, 2013
The value for
in root tissue is -3.3 bars. If you take the root
tissue and place it in a 0.1 M solution of sodium chloride at
20oC in an open beaker, what is the
of the solution, and in
what direction would the net flow of water be?
September 18, 2013
At 18oC, a cell with a
P of 3 bars is in equilibrium with the
surrounding 0.4M solution of sucrose in an open beaker. What
is the
S of sucrose in the cell?
September 18, 2013
September 18, 2013
Transporting Across the Membrane
September 18, 2013
Cystic Fibrosis
• Example of a disorder caused by a mutation in
a gene that codes for the cell membrane.
• CFTR (protein channel) sheets line sweat
glands, airways, sinuses, ducts in the
digestion and reproduction system.
• Allows mucus to slide freely on these linings
• Mutation= no hypertonic condition is
established on the exterior of the cell and
water does not flow outward
September 18, 2013
• Film doesn't form and the mucus becomes
thick and dried out.
• Lungs: Bacteria gets trapped in mucus
because of biofilms that form. These microbial
populations resist the body's defenses and
antibiotics. This leads to a thick mucus layer in
the lungs with a buildup of bacteria and
foreign particles.
September 18, 2013
• CF develops when one has two copies of the
mutant gene from each parent.
• CTFR is a type of membrane protein.
• Loss of a single amino acid during protein
synthesis is the cause of CF.
• CTFR protein is supposed to be modified and
shipped, but mutation and the change in
protein shape causes the protein to stop
working.
September 18, 2013
• "Breathe Life" Video