Membrane Structure and Function
5 Written Questions
5 Matching Questions
- Ion Channels
- Peripheral Proteins
- a Membranous proteins not bound in the lipid bilayer, but instead are appendages loosely bound to the surface of the membrane, and often to exposed parts of integral proteins.
- b Possessing a greater concentration of solvent
- c A molecule that binds specifically to a receptor site of another molecule.
- d A transmembrane protein channel that allows a specific ion to flow across the membrane down its concentration gradient
- e The state of a cell lacking water; is limp
5 Multiple Choice Questions
- Possessing a lesser concentration of solvent
- The coupling of the "downhill" diffusion of one substance to the "uphill" transport of another against its own concentration gradient.
- The diffusion gradient of an ion, representing a type of potential energy that accounts for both the concentration difference of the ion across a membrane and its tendency to move relative to the membrane potential.
- A type of endocytosis in which the cell ingests extracellular fluid and its dissolved solutes.
- A model of the cellular membrane in which the membrane is a fluid structure with a 'mosaic' of various proteins embedded in or attached to a double layer (bilayer) of phospholipids
5 True/False Questions
Active Transport → The diffusion of a substance across a biological membrane
Plasmolysis → The diffusion of water across a selectively permeable membrane
Amphipathic → Possessing a lesser concentration of solvent
Integral Proteins → Membranous proteins not bound in the lipid bilayer, but instead are appendages loosely bound to the surface of the membrane, and often to exposed parts of integral proteins.
Transport Proteins → Proteins spanning the cell membrane that allow passage for specific substances