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

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

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter39: Digestion And Nutrition

Section: Chapter Questions

Problem 11SQ

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Similar questions

Which of the following can be used to describe both desmosomes and adherens junctions? Select all that apply. They provide strong attachments through linkage with actin cytoskeleton O They provide strong attachments through linkage with intermediate filaments Both of them function to hold adjacent cells firmly together O Types of cadherin proteins are used to mediate cell-cell adhesion
In nonmuscle cell locomotion, which protein is activated to nucleate a filament? Arp2/3 Vinculin Gelsolin Profilin Cofilin
Given the diagram, what motor protein transports vesicles that are about to utilize cis-Golgi v-SNARES? Rough ER cis face Golgi complex trans face MTOC Cell membrane CopyrightO2000 Pearson Educelion, Inc.publhing as Berjamin Cummings O cytoplasmic kinesin O axonemal dynein O cytoplasmic dynein O myosin II 0+0+
10. The protein integrin binds to actin filaments and, by binding to proteins like fibronectins, connects to collagen. In this manner, integrin ______. (Choose all that apply) controls the permeability of the cytoplasmic membrane suspends organelles within the cytoplasm provides a direct linkage between the cytoskeleton and the extracellular matrix helps keep individual cells in place and connects adjacent cells to each other
Determine whether the following statements apply to microtubules, intermediate filaments, or actin filaments."a. Thinnest cytoskeletal filaments; are associated with the motor protein myosinb. Consist of proteins twisted together into a ropelike formc. Allow certain cells to “crawl” and change the shape and size of the celld. Consist of protein subunits surrounding a hollow coree. Help a cell to resist mechanical stressf. Grow from the cell’s centrosome"
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
Define Mitotic spindles can form inthe absence of centrosomes.
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
hich of the following statements is true about actin: OActin is translated by free ribosomes O Dyneins move toward the minus end of actin filaments actin can bind to GTP O actin filament is stabilized by ADP-binding
Which of the following is NOT a way intermediate filaments are unique compared to the other cytoskeletal filaments? intermediate filaments rely on accessory proteins for their function intermediate filaments can be found inside the nucleus intermediate filaments are made from fibrous protein subunits intermediate filaments do not have structural polarity O intermediate filaments do not interact with motor proteins
Microtubules are important for transporting cargo in nerve cell axons, as diagrammed in Figure Q17- 33. Notice that the two types of cargo are traveling in opposite directions. Which of the following statements is likely to be false? cell body microtubule axon Figure Q17-33 inward transport axon terminal The black cargo and the gray cargo require ATP hydrolysis for their motion. The gray cargo is attached to dynein. outward transport The black cargo and the gray cargo are moving along microtubules of opposite polarity. The black cargo moving toward the axon terminal contains a domain that specifically interacts with the tail domain of a particular kind of motor.
Neurons have long thin processes called axons, structuresspecialized for conducting signals throughout the organism’s nervous system. Some axonal processes can be as long as 2 m—for example, the axons that originate in your spinal cord and terminate in the muscles of your toes. Small membrane-enclosed vesicles carrying materials essential to axonal function move along microtubules of the cytoskeleton, from the cell body to the tips of the axons. If the average velocity of a vesicle is 1 μm/s, how long does it take a vesicle to move from a cell body in the spinal cord to the axonal tip in the toes?