Human Anatomy
9th Edition
ISBN: 9780135168059
Author: Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher: Pearson Education, Inc.,
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Chapter 2, Problem 10RQ
Name the cytoskeletal element (actin microfilaments, intermediate filaments, or microtubules) for each of the following.
a. give the cell its shape
b. resist tension placed on a cell
c. radiate from the centrosome
d. interact with myosin to produce contraction force
e. are the most stable
f. associated with kinesins and dyneins
g. associated with the motor protein myosin
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Name the cytoskeletal element (actin microfilaments, intermediate filaments, or microtubules) for each of the following.(a) give the cell its shape(b) resist tension placed on a cell(c) radiate from the centrosome(d) interact with myosin to produce contraction force(e) are the most stable(f) associated with kinesins and dyneins(g) associated with the motor protein myosin
A melanosome (type of vesicle containing the pigment melanin) is transported towards the nucleus of the cell. The hydrolysis of ATP is involved with this movement. Identify the most likely motor protein and cytoskeletal filament involved with this transport.
a.
Myosin, microtubules
b.
Kinesin, actin filaments
c.
Dynein, actin filaments
d.
Dynein, microtubules
e.
Kinesin, microtubules
f.
Myosin, actin filaments
Give two examples of biological functions that are enabled by microfilaments or microtubules together with associated motor proteins.These could be whole cell functions or functions within the cell.
Chapter 2 Solutions
Human Anatomy
Ch. 2 - What are the three general regions of a cell?Ch. 2 - What types of macromolecules compose the plasma...Ch. 2 - By what process does water enter and leave the...Ch. 2 - Which transport process carries large...Ch. 2 - Which cellular organelles are involved with...Ch. 2 - Which organelle produces the energy needed for...Ch. 2 - Which organelle would be prevalent in a cell that...Ch. 2 - Which cytoskeletal element functions to resist...Ch. 2 - What does the nucleolus produce?Ch. 2 - Which cytoplasmic organelle is continuous with the...
Ch. 2 - How does the appearance of extended chromatin...Ch. 2 - In which phase of the cell life cycle does the...Ch. 2 - Prob. 13CYUCh. 2 - Which cellular structures would be abundant in...Ch. 2 - Which organelles would be abundant in cells that...Ch. 2 - According to which aging theory presented here can...Ch. 2 - The endocytotic process in which particulate...Ch. 2 - The nuclear substance composed of histone proteins...Ch. 2 - Final preparations for cell division are made...Ch. 2 - Prob. 4RQCh. 2 - Identify the cell structure or organelle described...Ch. 2 - Prob. 6RQCh. 2 - The trans face of the Golgi apparatus (a) is its...Ch. 2 - Prob. 8RQCh. 2 - Name the appropriate stage of mitosis (prophase,...Ch. 2 - Name the cytoskeletal element (actin...Ch. 2 - Prob. 11RQCh. 2 - Which of these processes involves specific...Ch. 2 - List all the cytoplasmic organelles that are...Ch. 2 - Martin missed a point on his anatomy test because...Ch. 2 - In this chapter, we claimed that mitochondria are...Ch. 2 - Define chromosome, then compare the arrangement of...Ch. 2 - Prob. 17RQCh. 2 - Use the analogy of the cell as a manufacturing...Ch. 2 - Prob. 1CRCAQCh. 2 - Kareem had a nervous habit of chewing on the inner...Ch. 2 - The normal function of one tumor-suppressor gene...Ch. 2 - In their anatomy labs, many students are exposed...Ch. 2 - The sedative phenobarbital is a lipid-soluble...Ch. 2 - The drug vinblastine is used in cancer therapy to...Ch. 2 - Use the word roots listed at the start of Chapter...
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- 45. Which of the following accurately represents how intermediate filaments differ from actin filaments and microtubules? Only intermediate filaments ... … a) interact with extracellular matrix components. b) associate with motor proteins. c) are composed of the same protein subunits in all cells. d) are polar with plus and minus ends. e) play a purely structural role.arrow_forwardAbout intermediate filaments, microfilaments and microtubules, describes:a) In detail, their structures, characteristics as well as how their monomers can form the filamentsb) Functions of them in animal cellsarrow_forwardIn animal and yeast cells, it appears that these vesicles travel from the main cell body to the region where the new division is forming by moving along actin filaments. What type/family of motor protein might you expect to be associated with these vesicles to facilitate this transport? Briefly explain your reasoning.arrow_forward
- Match each of the following to its role in the cell. Microtubules Actin Tubulin Intermediate filaments Kinesin Dynein Myosin Centrosome A. Cytoskeletal fiber that is intermediate in diameter and very sturdy. Does not form from polymerization of protein monomers like the other ones we discussed in class, but consists of polypeptide strands. Keratin and Lamin A are examples. B. The structure that initiates polymerization of new microtubules and anchors microtubules in the center of the cell near the Golgi Complex. C. Motor protein whose activity results in contraction of muscle. D. Thinnest cytoskeletal filament. Responsible for initiation of amoeboid cell movement via pseudopod formation. E. The "monomer" unit of the thickest cytoskeletal polymer; a dimer of two polypeptide subunits. F. Cytoskeletal structure with the…arrow_forwardWhich of the following is NOT an example of microtubule-based motility? A. ciliary movement B.contractile ring of cleavage furrow C. pigment granule transport in fish scales D.axonal transport in neurons QUESTION 33 You are studying the role of microtubules and microfilaments in cell motility. You treat fibroblasts with cytochalasin, which inhibits microfilaments, or colchicine, which inhibits microtubules, and observe the following: In controls, the cells migrate in a directed way, elongating as they go. With cytochalasin treatment, the cells completely stop migrating while with colchicine treatment, the cells attempt to migrate in several directions at once. The best conclusion for this is: A Cytochalasin prevents cell migration and colchicine prevents directed cell migration. B. Microfilaments are necessary for cell migration and microtubules are necessary for directionality of migration. C. Microfilaments are necessary for cell migration and microtubules are sufficient for…arrow_forwardMark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.a. _____ Actin filaments combine with myosin motor proteins to provide the cell with mechanical strength.b. _____ The cilia found on sperm cells propel the cells through a liquid medium.c. _____ Microtubules are hollow tubes that align organelles and shuttle them to their proper places in the cell.d. _____ Intermediate filaments are ropelike structures composed of tubulin proteins.e. _____ Centrioles are part of the centrosome from which microtubules originate.f. _____ Endocytosis, exocytosis, muscle cell contraction, and cellular “crawling” are all mediated by intermediate filamentsarrow_forward
- A melanosome (type of vesicle containing the pigment melanin) is transported towards the nucleus of the cell. The hydrolysis of ATP is involved with this movement. Identify the most likely motor protein and cytoskeletal filament involved with this transport.arrow_forwardBelow are three statements - two of which are truths and one is a lie. Which of the following statements is a lie? Select one: a. Keratin - an intermediate filament, is classified as Types I and II or acid and base keratins. b. Microfilaments have two structures called bundles and networks. The former is used for movement inside the cell while the latter is for intercellular communication. c. Kinesin is a microtubule motor protein that helps in the transportation of cellular material essential to cell function and moves towards the minus end motor. Clear my choicearrow_forwardMatch each term to the phrase that describes it best. Cell fiber that can be found in muscle cells a. Primary cilium Largest of the cell fibers; act like "engines" for the cell b. Microfilaments c. Gap junctions d. Centrosomes e. Microtubules f. Cilia g. Intermediate filaments h. Microvilli i. Flagella j. Desmosomes k. Centrioles I. Tight junctionsarrow_forward
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