Human Anatomy & Physiology
1st Edition
ISBN: 9780805382952
Author: Erin C. Amerman
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 3.5, Problem 1QC
Summary Introduction
To review:
Match the terms microtubules, intermediate filaments, or actin filaments with the most closely related descriptions given below:
(a) Thinnest cytoskeletal filaments; are associated with motor protein myosin.
(b) Consists of proteins twisted together in a rope-like form
(c) Allow certain cells to “crawl” and change the shape and the size of the cell
(d) Consists of protein subunits surrounding a hollow core
(e) Help a cell to resist mechanical stress
(f) Grow from the cell’s centrosome
Introduction:
The microtubules, intermediate filaments, and the actin filaments belong to the cytoskeleton of the cell. The cytoskeleton is composed of the different types of the protein filaments, which are organized according to their functions.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
What is a microfilament?
A. A cytoskeletal element composed of tubulin that forms a dynamic scaffolding for many cellular processes involving movement
B. A type of energy-using protein that interacts with cytoskeletal elements to move the cell
C. A stable cytoskeletal element composed of fibrous proteins that structurally supports cells and tissues
D. A cytoskeletal element made of actin that reinforces cell membranes and functions in cell movement
Describe two similarities and two differences between actin filaments and microtubules.
Which of the following are differences between the assembly processes of intermediate filaments versus that of actin microfilaments?
A.
New subunits are added internally to the intermediate filament rather than at the ends
B.
Assembly requires GTP rather than ATP
C.
Intermediate filaments are assembled from multiple tetramers rather than from monomers.
D.
A and B
E.
A and C
Chapter 3 Solutions
Human Anatomy & Physiology
Ch. 3.1 - What are the general functions of cells?
Ch. 3.1 - Prob. 2QCCh. 3.1 - Where are intracellular and extracellular fluids...Ch. 3.2 - How do the phospholipids arrange themselves in the...Ch. 3.2 - 2. How is the plasma membrane described according...Ch. 3.2 - List five functions of membrane proteins.Ch. 3.2 - What roles do cholesterol, glycoproteins, and...Ch. 3.3 - The energy for passive processes comes from the...Ch. 3.3 - Mark each of the following statements as true or...Ch. 3.3 - Simple diffusion is a passive process, but...
Ch. 3.3 - Mark each of the following statements as true or...Ch. 3.3 - Mark each of the following statements as true or...Ch. 3.3 - How does the process of primary active transport...Ch. 3.3 - What is the main primary active transport pump in...Ch. 3.3 - Describe the process of secondary active...Ch. 3.3 - What are the three types of endocytosis, and how...Ch. 3.3 - Explain the basic process of exocytosis.Ch. 3.4 - 1. Identify the properties listed in the next...Ch. 3.4 - Identify the following properties as belonging to...Ch. 3.4 - To what destinations can products from the Golgi...Ch. 3.5 - Prob. 1QCCh. 3.5 - Prob. 2QCCh. 3.5 - Prob. 3QCCh. 3.6 - 1. What are the main components of the nucleus?...Ch. 3.6 - What is chromatin? How are chromatin and...Ch. 3.6 - 3. What is a nucleolus, and what is its...Ch. 3.7 - How is a codon related to a triplet?Ch. 3.7 - 2. Describe the basic steps of transcription.
Ch. 3.7 - Explain how tRNA acts as the translator of the...Ch. 3.7 - Describe the basic steps of translation.Ch. 3.7 - 5. Why is posttranslational modification...Ch. 3.7 - 6. Why is it important to regulate gene...Ch. 3.8 - What happens during each stage of the cell cycle?Ch. 3.8 - What does semiconservative replication mean?Ch. 3.8 - Describe the changes in the cell that take place...Ch. 3.8 - What are four external factors that play a role in...Ch. 3 - Which of the following is not a basic function...Ch. 3 - Prob. 2CYRCh. 3 - What are the two fluid compartments in the body,...Ch. 3 - 4. Which of the following best describes the...Ch. 3 - Mark the following statements about the plasma...Ch. 3 - 6. What is the primary difference between active...Ch. 3 - 7. Match the term with its appropriate...Ch. 3 - 8. Fill in the blanks: A hypotonic solution will...Ch. 3 - 9. Match the following terms with the correct...Ch. 3 - Prob. 10CYRCh. 3 - Mark the following statements about the...Ch. 3 - 12. Our somatic cells’ DNA is distributed among...Ch. 3 - Explain how and why chromatin is condensed in the...Ch. 3 - Which of the following statements correctly...Ch. 3 - Each of the following statements about protein...Ch. 3 - Number the following steps of protein synthesis in...Ch. 3 - Which of the following is not a phase of mitosis?...Ch. 3 - 18. Why is regulation of the cell cycle...Ch. 3 - 19. Mark the following statements about the cell...Ch. 3 - 20. Match the following terms with the correct...Ch. 3 - 1. Write a single sentence, using no more than 25...Ch. 3 - 2. Certain diseases are transmitted via...Ch. 3 - 3. Explain how the form of each of the following...Ch. 3 - Certain types of cancerous lung tumors can secrete...Ch. 3 - Why do you think the rate of cell division is...Ch. 3 - 1. A patient is admitted to the hospital and...Ch. 3 - A popular science fiction program once had an...Ch. 3 - Prob. 3AYKACh. 3 - Prob. 4AYKACh. 3 - 5. Explain how buffer systems in the body work if...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_forwardGive 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.arrow_forward(a) If you were to magnify a cell 10,000-fold (typical of the magnification achievedusing an electron microscope), how big would it appear? Assume you are viewing a“typical” eukaryotic cell with a cellular diameter of 50 μm.(b) If this cell were a muscle cell (myocyte), how many molecules of actin could ithold? Assume the cell is spherical and no other cellular components are present; actinmolecules are spherical, with a diameter of 3.6 nm. (c) If this were a liver cell (hepatocyte) of the same dimensions, how manymitochondria could it hold? Assume the cell is spherical; no other cellular components arepresent; and the mitochondria are spherical, with a diameter of 1.5 μmarrow_forward
- a) Are actin filaments subject to the same "dynamic instability" as microtubules? Yes or no? b)Explain how both actin and microtubules polymerize and depolymerize.arrow_forwardList the three types of filaments associated with the cytoskeleton. Identify the structures in cells that are composed of microtubules.arrow_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
- Which of the following describes an F-actin microfilament? A flexible, helical filament composed of two strands assembled from G-actin 13 protofilaments composed of heterodimers with a hollow core a flexible filament composed of 13 interwoven protofilaments Eight tetramers twisted into a rope-like filamentarrow_forwardExplain how the structure of intermediate filaments makes them better suited to provide mechanical strength than either microtubules or actin filaments.?arrow_forwardSome genetic diseases cause deficient activity of lysosomes. What would be the direct consequence of these diseases? a.Fewer macromolecules within the cytosol. b.Less degradation of old organelles. c.Increased hydrolysis of macromolecules. d.Reduce rate of endocytosis.arrow_forward
- Which of the following statements are true for both actin and tubulin: a. Both actin and tubulin filaments are hollow. b. Both actin and tubulin are structural proteins capable to form filaments that can grow from both (+) and (-) ends. c. Both actin and tubulin require GTP for polymerization into filaments. d. Both actin and tubulin require ATP for polymerization into filaments.arrow_forwardFrom the image, what is the normal function of the missing structure? A. A lipid bilayer controlling the movement of substances into and out of the cell B. A motor protein that "crawls" along microtubules to contract and release them, which provides movement C. A cytoskeleton element composed of tubulin subunits to provide structure for movement of the cellarrow_forwardActin and microtubules have polarity, intermediate filaments have no polarity. What is the main consequence of this difference?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning