29 Questions
What is the function of microfilaments in a muscle cell?
To generate lots of force
Which protein monomer forms microtubules?
Tubulin
What is the primary cilium's function?
To sense important stimuli
Which protein can 'walk' and advance along microfilaments?
Myosin
What is the function of intermediate filaments?
To confer stability to cells
Which intermediate filament is found in muscle cells and some epithelial cells?
Desmin
Where are keratins primarily found?
In epithelial cells, hair, and nails
Which intermediate filament confers stability and structure to glial cells?
Vimentin
What is the function of neurofilaments?
To provide strength across the cell
What is responsible for the shape of microvilli?
Actin filaments
Which of the following is NOT a function of membrane proteins?
Cellular movement
What is the purpose of tight junctions in cells?
To regulate movement across membranes
Which of the following is NOT a component of an anchoring junction?
Microfilaments
What is the function of microfilaments in the cytoskeleton?
Structural organization of the plasma membrane
What factors contribute to the stability of F-actin in microfilaments?
Capping proteins
Which type of lipid has a sphingosine backbone instead of a glycerol backbone?
Sphingolipids
Which type of lipid is a type of steroid and can intercalate between phospholipids?
Cholesterol
Which type of lipid impacts membrane fluidity depending on its amount?
Cholesterol
Which type of lipid has sugar residues and can contribute to the glycocalyx?
Sphingolipids
Which type of lipid has a phosphate 'head' linked to another molecule?
Glycerophospholipids
Which type of transport requires the hydrolysis of ATP?
Active transport
What is the main function of aquaporins in the plasma membrane?
To allow water molecules to traverse the membrane
What is the role of the Na+/K+ ATPase in preventing cell swelling?
All of the above
What is the diffusional force that drives sodium into the cell?
The high concentration of sodium in the extracellular fluid
What is the main function of the membrane surrounding organelles in the cell?
To control the environment needed for its specific function
Which of the following is true about the formation of micelles and bilayers in the cell membrane?
Bilayers are more thermodynamically favorable than micelles
What is the main function of the phospholipid bilayer in the cell membrane?
Serving as a barrier to the movement of molecules
Which of the following is true about the integrity of the plasma membrane?
It is important for cellular movement and shape
Which membrane-bound components might have more cholesterol and/or sphingolipids?
Golgi and ER
Test your knowledge on membrane proteins and their wide range of functions in this quiz. Explore their role in signaling, transport, homeostasis, protection, and cell structure. Get ready to dive into the fascinating world of anatomy and physiology!
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