How does the fluidity of membranes enable endocytosis and exocytosis, and what role do vesicles play in moving materials within cells?
IB Biology
How do particles move across membranes through processes such as simple diffusion, facilitated diffusion, osmosis, and active transport?
How do particles move across membranes through processes such as simple diffusion, facilitated diffusion, osmosis, and active transport?
How does the falsification of the Davson-Danielli model demonstrate the process of one theory being replaced by another?
How does the falsification of the Davson-Danielli model demonstrate the process of one theory being replaced by another?
How was the Davson-Danielli model falsified, leading to the adoption of the Singer-Nicolson model, and what does this show about using models as representations of the real world?
How was the Davson-Danielli model falsified, leading to the adoption of the Singer-Nicolson model, and what does this show about using models as representations of the real world?
What evidence from electron microscopy led to the proposal of the Davson-Danielli model?
What evidence from electron microscopy led to the proposal of the Davson-Danielli model?
How can the fluid mosaic model be represented in a drawing?
How can the fluid mosaic model be represented in a drawing?
How does cholesterol affect membrane fluidity and permeability to certain solutes in mammalian membranes?
How does cholesterol affect membrane fluidity and permeability to certain solutes in mammalian membranes?
What role does cholesterol play as a component of animal cell membranes?
What role does cholesterol play as a component of animal cell membranes?
How do membrane proteins vary in structure, position within membranes, and function?
How do membrane proteins vary in structure, position within membranes, and function?
Why do phospholipids form bilayers in water, and how do their amphipathic properties contribute to this structure?
Why do phospholipids form bilayers in water, and how do their amphipathic properties contribute to this structure?