How do I describe the fluid mosaic model?
Quick Answer
The fluid mosaic model represents the structure of a cellular membrane as a bilipid layer irregularly interspersed with protein in which the positions of individual bilipid and protein molecules are dynamic. In this model, lipids maintain flexibility and limit diffusion while proteins transport molecules through the membrane.
Continue ReadingFull Answer
The fluid mosaic model infers the structure of cell membranes in their native state using ultrathin sectioning under electron microscopes. Newer membrane models take advantage of technology available to view single molecules, including atomic force microscopy. Stochastic optical reconstruction microscopy has broken the light diffusion barrier, capturing images of mitochondria and spindle fibers. A Protein Layer–Lipid–Protein Island model proposes a compressed outer protein layer on top of the bilipid layer and clusters of proteins inside the bilipid layer. An outer protein layer better protects the bilipid layer from environmental stresses. This layer is less flexible than the dynamic layer represented in the fluid mosaic model. Clustering on the inner side of the membrane increases protein efficiency over randomly interspersed proteins.
Membrane model accuracy improves as observational techniques advance. However, past research has focused on molecular interactions at the membrane. The models do not account for complex interactions between cells or the influence of elements within the cell.
Learn more about CellsRelated Questions
-
Q:
How does diffusion affect cells?
A: Diffusion affects cells by allowing molecules to pass through or around a cell's selectively permeable outer membrane. Diffusion is powered by kinetic move... Full Answer >Filed Under: -
Q:
What is the structure and function of the respiratory membrane?
A: The respiratory membrane, also called the respiratory surface, is made of the alveolar epithelial cell and the pulmonary capillary endothelial cell, and th... Full Answer >Filed Under: -
Q:
What is a vacuole membrane?
A: A vacuole membrane, or tonoplast, is a lipid structure that surrounds and encases the vacuole. The membrane allows certain substances to flow in and out of... Full Answer >Filed Under: -
Q:
What is a simple plant cell model?
A: A simple plant cell model is a somewhat rectangular structure encased within a cell wall and cell membrane. Inside the cell is the cytoplasm, a jelly-like ... Full Answer >Filed Under:
