12 Questions
What does the fluid mosaic model of cell membranes emphasize?
Free movement of most phospholipids and many proteins
How does a membrane's fluidity change with a high proportion of unsaturated fatty acids?
It becomes more fluid
What role does cholesterol play in moderating a membrane's fluidity?
Decreases fluidity in already viscous membranes
What is the function of transport proteins in cell membranes?
Allow for facilitated diffusion of polar molecules and ions
How do channel proteins differ from carrier proteins in terms of membrane transport?
Carrier proteins change shape to transport molecules
If diffusion does not occur due to a difference in solute concentration, what process results in a net movement of water across a membrane?
Osmosis
What type of transport proteins can move more than one solute at a time?
Symport proteins
What process uses transmembrane receptor proteins to selectively bring in large amounts of the same solute very specifically?
Receptor mediated endocytosis
What occurs when a ligand binds to a receptor protein, causing a change in the shape of the protein?
Reception
Which type of proteins can move solutes towards higher concentration using metabolic energy?
Antiport proteins
What process involves assemblages of molecules being brought into a cell and can create large vesicles to bring in large amounts of material?
Phagocytosis
What type of transport allows cells to constantly transport many different solutes at the same time using multiple transport proteins working together?
Active transport
Explore the fluid mosaic model of cell membranes, which highlights the dynamic nature of cell membranes due to the movement of phospholipids and proteins. Learn how the lipid composition influences the fluidity of membranes and how some molecules can be anchored for structure in specialized cells.
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