Textbook Question
Our somatic cells' DNA is distributed among 46 ________ in the nucleus.
a. Nucleosomes
b. Chromatids
c. Nucleoli
d. Chromosomes
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Ch. 3 The Cell
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology26
- Ch. 2 The Chemistry of Life38
- Ch. 3 The Cell55
- Ch. 4 Histology47
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System36
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System42
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart30
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity45
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Chapter 3, Problem 11e
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
Centrioles are part of the centrosome from which microtubules originate.
Verified step by step guidance1
Understand the role of centrioles and the centrosome in the cytoskeleton. Centrioles are cylindrical structures made of microtubules, and they are part of the centrosome, which is the microtubule-organizing center in animal cells.
Review the function of the centrosome. The centrosome is responsible for organizing microtubules and plays a key role in cell division by forming the mitotic spindle.
Evaluate the statement: 'Centrioles are part of the centrosome from which microtubules originate.' This statement is true because centrioles are indeed located within the centrosome, and the centrosome is the site where microtubules originate and are organized.
If the statement were false, you would need to correct it by clarifying the relationship between centrioles and the centrosome. For example, you could state: 'Centrioles are located within the centrosome, but microtubules originate from the pericentriolar material surrounding the centrioles.'
Conclude that the statement provided is accurate and does not require correction, as it correctly describes the relationship between centrioles and the centrosome in the context of microtubule organization.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Cytoskeleton
The cytoskeleton is a dynamic network of protein filaments and tubules that provides structural support, shape, and organization to cells. It plays a crucial role in cell division, intracellular transport, and maintaining cell integrity. The three main components of the cytoskeleton are microfilaments, intermediate filaments, and microtubules.
Recommended video:
06:05
Introduction to the Cytoskeleton
Centrosome
The centrosome is an organelle that serves as the main microtubule organizing center in animal cells. It consists of a pair of centrioles surrounded by a protein matrix. The centrosome is essential for the formation of the mitotic spindle during cell division, facilitating the proper segregation of chromosomes.
Recommended video:
04:02Centrosomes & Mitotic Spindles
Microtubules
Microtubules are cylindrical structures made of tubulin protein subunits that are part of the cytoskeleton. They are involved in various cellular processes, including maintaining cell shape, enabling motility through cilia and flagella, and serving as tracks for the transport of organelles and vesicles. Microtubules originate from the centrosome and are critical for cell division.
Recommended video:
03:14Cilia & Flagella
Related Practice
Textbook Question
Explain how and why chromatin is condensed in the nucleus.
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Textbook Question
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
Endocytosis, exocytosis, muscle cell contraction, and cellular 'crawling' are all mediated by intermediate filaments.
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Textbook Question
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
Microtubules are hollow tubes that align organelles and shuttle them to their proper places in the cell.
589
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Textbook Question
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
The cilia found on sperm cells propel the cells through a liquid medium.
596
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Textbook Question
Mark the following statements about the cytoskeleton as true or false. If a statement is false, correct it to make a true statement.
Intermediate filaments are ropelike structures composed of tubulin proteins.
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