Download Cell Membrane

Cell Membrane
(aka Plasma Membrane)
Use this site to complete the notes below:
http://www.wisc-online.com/objects/construction-of-the-cell-membrane/
The cell membrane is mainly made up of l________ and p__________________.
The key structure is a double layer of molecules called p__________________.
The membrane has two types of proteins – fibrous proteins and the globular shaped integral
and peripheral proteins. Integral proteins are found within the m____________ and
peripheral proteins are on the s______e.
Molecules in the Cell Membrane (write names below)
Because the membrane is mostly lipid only lipid-soluble substances such as o____________,
c____________ d____________ and s____________ can easily go through. Water soluble
substances such as g____________, amino acids, i____________ and w____________ need
various proteins to be transported through.
Complete the diagram and label
Two layers of phospholipid self-assemble so that their water soluble (h____________) head
form the surface and interior of the membrane, and the water i__________________
(hydrophobic) tails face each other.
Complete the table
Part of membrane
Function
Receptor (Fibrous protein, integral type)
Pore (Globular protein type)
Channel protein (an integral type)
Peripheral protein (globular type)
Label each part
One final part…
What is this molecule (on right)?
Where is it found?
What does it do?
The molecule also increases the fluidity of the membrane. Infer what would happen to the
membrane if there was less of it. Of what consequence would that be to a living cell?
Summary: These ideas collectively are known as the fluid mosaic model. Use google to find
out what this means.
Membranes are said to be selectively permeable. Find out what this means. Why is
‘selectively’ permeable more correct than ‘semi’ permeable?
Scroll through the rest of the internet task.