POTATO CELLS LAB.

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Presentation transcript:

POTATO CELLS LAB

MOLECULES ARE TOO TINY TO SEE? How do we know they are there? Change color to tell you a molecule is present INDICATORS- Starch + iodine = BLACK COLOR

“Potato cells” 3 cm 3 cm 1 cm 1 cm 2 cm 2 cm 1 cm 2 cm 3 cm http://www.biologyjunction.com/images/clip01351.jpg

Cut 3 Potato cells of different sizes Place ALL “cells” into iodine AT SAME TIME. Cover with lid Let them sit overnight

WHAT WILL HAPPEN?

WHAT WILL HAPPEN?

Remove "potato cells" from iodine Place on table Cut in half Measure the width of the black stripe around the edge of the square

Calculate the volume where iodine diffused BIG OUTSIDE CUBE= TOTAL VOLUME LITTLE INSIDE CUBE= Volume diffusion didn’t reach BIG OUTSIDE CUBE – LITTLE INSIDE CUBE = VOLUME REACHED BY DIFFUSION

2 sides are: 1 X 1 4 sides are: 1 X 8 X 2 X 4

If having a HIGH SA/VOL RATIO gets the cell what it needs faster, WHAT WOULD BE A GOOD SHAPE TO BE? How can you increase the surface area of a cell?

STRUCTURE/FUNCTION http://www.telomeretesting.net/telomeres-image-nasa.jpg

http://www.lhsc.on.ca/_images/Genetics/mitochondrion_000.jpg

Image modified from: http://www. nature

https://upload. wikimedia. org/wikipedia/commons/1/1a/NSRW_Root-Tip https://upload.wikimedia.org/wikipedia/commons/1/1a/NSRW_Root-Tip.png http://www.nps.gov/parkhistory/online_books/chic/barker-jameson/images/fig13.jpg http://www.riverpartners.org/img/riparian-ecology/root-double-diagram_600.jpg

https://classconnection. s3. amazonaws https://classconnection.s3.amazonaws.com/1444/flashcards/678763/jpg/smooth-muscle.jpg https://universalchangegroup.files.wordpress.com/2014/09/muscle-cells.jpg

http://i.ytimg.com/vi/j03HTAbjsWw/hqdefault.jpg https://kin450-neurophysiology.wikispaces.com/file/view/neuronpicusethis.jpg/141318041/neuronpicusethis.jpg

http://www.microscopy-uk.org.uk/mag/imgapr08/image007.jpg http://wps.aw.com/wps/media/tmp/labeling/2807010_dyn.jpg

WORKS FOR ORGANELLES TOO! http://www.cbv.ns.ca/bec/science/cell/page19a.jpg

http://oac.med.jhmi.edu/res_phys/Encyclopedia/Alveoli/AlveoliDrawing.GIF WORKS FOR ORGANS TOO! hhttp://happytummiesdigest.com/wp-content/uploads/2016/06/1.jpgttp://www.sciencepicture.co/search_pill_2.html http://www.cbv.ns.ca/bec/science/cell/page19a.jpg

WORKS FOR CANCER CELLS TOO! SEM Image by: Riedell CHO (Chinese Hamster Ovary) cells in culture