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Law School. Graduate School. High School. Middle School. Related Content November 12, Tips for studying biology. November 1, Working out your brain. That is the question. October 13, Dreaming and designing: a short guide to your many lives.
October 11, The role of insurance and common threats in health insurance markets. September 27, How to solve an empirical formula problem. September 24, Quantum numbers. Clear Tags close Close. Blog We found results. College High School Middle School. Tutors Blog Join us. Follow us. Key Points The membrane is fluid but also fairly rigid and can burst if penetrated or if a cell takes in too much water.
The mosaic nature of the plasma membrane allows a very fine needle to easily penetrate it without causing it to burst and allows it to self-seal when the needle is extracted. If saturated fatty acids are compressed by decreasing temperatures, they press in on each other, making a dense and fairly rigid membrane.
The ratio of saturated and unsaturated fatty acids determines the fluidity in the membrane at cold temperatures. Cholesterol functions as a buffer, preventing lower temperatures from inhibiting fluidity and preventing higher temperatures from increasing fluidity. Key Terms phospholipid : Any lipid consisting of a diglyceride combined with a phosphate group and a simple organic molecule such as choline or ethanolamine; they are important constituents of biological membranes fluidity : A measure of the extent to which something is fluid.
The reciprocal of its viscosity. Membrane Fluidity There are multiple factors that lead to membrane fluidity. Carbohydrates attached to lipids glycolipids and to proteins glycoproteins extend from the outward-facing surface of the membrane. Provided by : Boundless. October 28, October 16,
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