When did Robert Hooke first observe cells in 1665?
Robert Hooke observed the empty chambers of cork through a primitive microscope in 1665. He named these tiny spaces cells but could not see the thin boundary separating them from the outside world.
Questions about Cell membrane
Short answers, pulled from the story.
What year did Gorter and Grendel publish their lipid bilayer hypothesis for cell membranes?
Gorter and Grendel published their groundbreaking hypothesis suggesting that cell membranes consisted of two layers of lipids in 1925. Their research on human red blood cells provided the first solid evidence for this structure with a ratio of approximately 2:1.
Who proposed the fluid mosaic model for cell membranes in 1972?
Singer and Nicolson proposed the fluid mosaic model in 1972 to describe how proteins float within the lipid bilayer. This model explains how integral proteins span the membrane while peripheral proteins attach temporarily to carry out enzymatic work.
How thick is the sarcolemma compared to general cell membranes?
The average thickness of the sarcolemma measures 10 nanometers compared to the 4 nanometer thickness of general cell membranes. The sarcolemma serves as the specialized cell membrane for muscle tissue and transmits synaptic signals to generate action potentials.