Which of the following most accurately describes tight junctions?They allow adjacent cells to share tensile stress by linking their intermediatefilament cytoskeletonsThey allow adjacant cells to control the passage of molecules between themThey bind actin filaments and assist cells to crawlThey allow cells to directly exchange small molecules with adjacent cells

Many tissues contain intercellular junctions between cells . Most kind of epithelium band some…

Which of the following most accurately describes tight junctions? They allow adjacent cells to share tensile stress by linking their intermediate filament cytoskeletons They allow adjacnt cells to control the passage of molecules between them They bind actin filaments and assist cells to crawl They allow cells to directly exchange small molecules with adjacent cells

Which of the following most accurately describes tight junctions? They allow adjacent cells to share tensile stress by linking their intermediate filament cytoskeletons They allow adjacnt cells to control the passage of molecules between them They bind actin filaments and assist cells to crawl They allow cells to directly exchange small molecules with adjacent cells

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter5: Membranes And Transport

Section: Chapter Questions

Problem 1TYK: In the fluid mosaic model: plasma membrane proteins orient their hydrophilic sides toward the...

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A fabric company wants to create a new material based on cell research for the army that is able to bear high levels of tension efficiently. What cellular structure should be the target? Microtubules O Intermediate filaments O Actin filaments O Centriols O Pili
In vertebrates, which cell-cell junction allows for direct chemical communication between adjacent cell cytoplasms, without contact with the extracellular fluid, and is composed of the transmembrane protein connexin? O Desmosome O Gap junctions O Adherens junctions O Tight junctions O Focal adhesions
Integrins are important in cell crawling because they anchor the leading edge of the cell to the surface it is moving over they are receptors for diffusible chemical ligands that determine the direction the cell will move in they cross-link actin filaments to microtubules and intermediate filaments of the cytoskeleton they serve as nucleating sites for polymerization of new actin filaments
Intermediate filaments are distinct from microtubules in all of the following EXCEPT: intermediate filaments are more dynamic. intermediate filaments do not have associated motor proteins. intermediate filaments do not need ATP to assemble. intermediate filaments are distinct from microtubules in all of these ways. O intermediate filaments are not directional. * Previous
What is NOT an example of microfilament-based structures in a cell? Stress fibres Filopodia Cilia O Lamellipodium at the leading edge O Microvilli
A couple is told by their doctor that they cannot have children because the sperm of the male lack motility. Which cellular structures are likely to be dysfunctional? Microtubules O All are correct O Microfilaments Intermediate filaments
In nonmuscle cell locomotion, which protein is activated to nucleate a filament? Arp2/3 Vinculin Gelsolin Profilin Cofilin
Which molecule is an important component of the extracellular matrix of animal cells? O flagellin O actin microfilaments O collagen O intermediate filaments O microtubules
Which of the following statements related to intercellular junctions is false? Cadherins are important cell-cell adhesion proteins. A cadherin-mediated junction involves many cadherin molecules to achieve strong adhesion. The cytoplasmic domain of cadherins interacts with actin or intermediate filament cytoskeleton through adaptor proteins. Because tight junctions seal the membrane of adjacent epithelial cells, transmembrane proteins in the apical portion of the plasma membrane cannot move to the basal lateral domain or vice versa. Proteins can diffuse through an open gap junction.
The abundant intercellular connections gab junction can be found in O diaphragm O Heart muscle O Skeletal muscle O Smooth muscle
The extracellular matrix is NOT composed of? OActin O Collagens Fibronectin O Proteoglycans O None of these
Which of the following are characteristics of both actin filaments and microtubules? Select all that apply They have structural polarity Their filaments undergo treadmilling Capping proteins affect length and stability of the filament The monomers bind ATP and spontaneously form polymers