https://padlet.com/solitaryfreedom/ib_bio_cellmembrane ~biology is a collaborative endeavour~ en-us 2017-03-08 01:45:33 UTC 2017-05-17 01:51:42 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Soccerball.png solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/158541507 hypothesis || "An interesting application of the capacity of blood is in calculating the thickness of the membrane" 

conclusion || The cell membrane is 3nm/one molecule thick]]> 2017-03-08 01:53:32 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/158541507 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/158543146 hypothesis || There is a fatty layer of substances on the membrane that makes it two molecules thick

conclusion || The cell membrane is a lipid bi-layer that is two molecules thick]]> 2017-03-08 02:06:59 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/158543146 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159544648 hypothesis || There is a film coating the bi-layer to account for permeability, among other factors.

conclusion || The cell's lipid bi-layer is coated on both sides by proteins]]> 2017-03-13 00:13:53 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159544648 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159545847 hypothesis || The dense line seen in microscopes is actually a pair of lines (lipid bi-layer) with associated proteins

conclusion || Confirmed that the membrane is made of bi-layers, and there are protein heads. ]]> 2017-03-13 00:34:16 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159545847 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159546231 Revised the model to reflect the new findings and added hydrophillic protein pores in a flash of inspiration]]> 2017-03-13 00:39:50 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159546231 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159546293 hypothesis || The proteins are embedded inside the membrane

conclusion || Through topography freeze-etching, it was proven that the proteins are embedded in the membrane from the bumps on the surface.]]> 2017-03-13 00:41:00 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159546293 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159546664 hypothesis || The cell membrane is not rigid.

conclusion || The cell membrane is a fluid structure where diffusion occurs]]> 2017-03-13 00:46:38 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159546664 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159546754 hypothesis || The cell membrane's bi-layers are polarized, and there are water soluble proteins.

conclusion || The lipids are hydrophobic and hydrophilic, and there are integral + peripheral proteins in the cell model. ]]> 2017-03-13 00:48:21 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159546754 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159547117 The history of cell membrane discoveries demonstrate that biology is a collaborative endeavor because each discovery was built on the findings of someone else. There had to be a discovery of cells for Fricke to want to study the cell membrane, and the final conclusion that the membrane is made of lipid bi-layers with protein heads had to be backed up by different discoveries. Singer's fluid-mosaic diagram we use today relies on the information that all the previous scientists discovered or proved. Without collaboration, we would not know so much about biology and cells.]]> 2017-03-13 00:52:47 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159547117 solitaryfreedom https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159547640 2017-03-13 01:01:16 UTC https://padlet.com/solitaryfreedom/ib_bio_cellmembrane/wish/159547640