5 Questions
Which structure separates cells from the external environment?
Plasma Membrane
What is the width of the plasma membrane?
5 to 10 nm
Who proposed the idea of a lipid bilayer in cellular membranes?
E. Gorter and F. Grendel
What did E. Gorter and F. Grendel extract the lipid from to study cellular membranes?
Animal cells
What did E. Gorter and F. Grendel measure to calculate the surface area covered by the lipid?
Surface area of water
Study Notes
Cellular Membranes
- The plasma membrane separates cells from the external environment.
Plasma Membrane Structure
- The plasma membrane is approximately 5-10 nanometers (nm) in width.
Lipid Bilayer Theory
- The idea of a lipid bilayer in cellular membranes was proposed by Gorter and Grendel.
Lipid Extraction and Analysis
- E. Gorter and F. Grendel extracted lipid from red blood cells to study cellular membranes.
- They measured the surface area of monolayers to calculate the surface area covered by the lipid.
Quiz: Introduction to the Plasma Membrane in Cell Biology Test your knowledge on the fundamental concepts of the plasma membrane in cell biology. Explore the structure and function of this thin yet essential barrier that separates cells from their external environment. Discover key terminology and gain a deeper understanding of the cell surface membrane.
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