RE: [HAPS-L] Cell labs

["Rawding, Robert S" <RAWDING001@xxxxxxxxxx>]

Peggy,

The PhysioEx CD bundled with Marieb's and Ric Martini's books has a nice
simulation on cell membrane function that covers diffusion - passive and
facilitated, osmosis and osmotic pressure, and active transport.

The lab would require some PC's, though.   There are also some nice labs
around in which peroxidases are used to illustrate enzyme function -
they require a Spec20 spectrophotometer.

In both cases we work with the cell models we have available and couple
that with a short video (whose name eludes me right now).

There is another option too- freshwater 'critters' that are easy to
maintain in the lab and are fascinating to observe - use amoebas
(amoebae?) for sol-gel transformations, paramecia, for contractile
vacuole formation and cilia, Stentor, also for cilia, and maybe a few
more, some with flagellae.

If someone (you or a student) 'donates' some RBC's, you have a nice
exercise by preparing isotonic, hypotonic, and hypertonic solutions in
which to suspend the cells - prepare solutions of each and place a drop
on a microscope slide.   Then add a tiny drop of red cells.

My 2 cents worth.

Bob



-----Original Message-----
From: HAPS-L-owner@xxxxxxxxxxx [mailto:HAPS-L-owner@xxxxxxxxxxx] On
Behalf Of Peggy LePage
Sent: Monday, February 19, 2007 4:19 PM
To: HAPS-L@xxxxxxxxxxx
Subject: [HAPS-L] Cell labs

Does anyone have any interesting cell labs...we are doing
osmolarity/tonicity but need another lab to support their understanding
of a functional cell.  It seems they know the basics regarding the
organelles and have a handle on DNA/RNA, protein synthesis but do not
seem to relate to "how cells function" so the progression to histology
and myocyte/neuron physiology can seem pretty overwhelming.  
Thanks,
Peggy 


----
Peggy LePage
Professor of Biological Sciences
North Hennepin Community College
PLEPAGE@xxxxxxxx     peggy.lepage@xxxxxxxxx
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