30 Questions
Which junction is involved in regulating movement across membranes and other epithelial structures?
Desmosome
Which component of an anchoring junction binds to intermediate filaments?
Plaque
Which type of junction connects cells to the basement membrane and underlying connective tissue?
Hemidesmosome
Which type of junction connects with microfilaments formed from actin?
Adherens junction
Which cytoskeletal structure is responsible for trafficking of organelles and cell division?
Microtubules
According to the text, which of the following is true about osmosis?
Water is free to move across the membrane
What is the function of the Na+/K+ ATPase?
All of the above
Which type of transport requires energy?
Active transport
What is the role of aquaporins?
To facilitate passive transport of molecules
Why are cell membranes semipermeable?
To allow water and many other solutes to traverse them
Which of the following is NOT a lipid component of the cell membrane?
Glycolipids
Which of the following is NOT a function of the plasma membrane?
Protein synthesis
Which of the following is NOT a type of transport across the plasma membrane?
Exocytosis
Which of the following is NOT a force at play across the cell membrane?
Gravity
Which of the following is NOT a component of the cytoskeleton?
Golgi apparatus
Which of the following lipid components has an impact on membrane fluidity based on its amount?
Cholesterol
What is the main function of the glycocalyx?
Binding to carbohydrates
Which of the following is true about the formation of micelles and bilayers?
Bilayers are more favorable than micelles
What is the main function of membrane proteins?
Transport & General Homeostasis
What is the main force at work across the cell membrane during diffusion?
Gibbs' free energy
Which of the following is true about extracellular signals and cell membrane receptors?
Extracellular signals are propagated into the cytosol through high-affinity protein receptors on the cell membrane.
What is the role of membrane proteins in the cell?
All of the above
What is the function of tight junctions?
Separate cells into apical and basal compartments
What are the three domains of most cell membrane receptors?
Hydrophobic, extracellular, intracellular
What is the role of membrane proteins that link the cell to extracellular structures?
Junctions
Which protein monomers form dimers to create microtubules?
Tubulin
What happens to the dimer when GTP is cleaved in tubulin?
It falls off the microtubule
What is the function of the microtubule organizing centre (MTOC) in cellular organization?
Determines cell polarity
Which proteins can move along microtubules and cause the 'whipping' movements of cilia and flagella?
Dyneins and kinesins
What is the primary function of intermediate filaments?
Cell stability
Test your knowledge on plasma membrane and signaling with this quiz! Learn about how cells respond to extracellular signals, growth factors, hormones, and more. Explore the role of protein receptors on the cell membrane and how signals are propagated into the cytosol.
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