Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Histology is the division of microscopic anatomy that studies the cellular level of organization.
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Ch. 4 Histology
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 4, Problem 7b
Compare and contrast the following pairs of terms:
Unicellular gland and multicellular gland
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Define a unicellular gland: A unicellular gland is a single-celled gland that secretes substances directly onto a surface or into a lumen. An example is a goblet cell, which secretes mucus in the respiratory and digestive tracts.
Define a multicellular gland: A multicellular gland is composed of multiple cells that work together to produce and secrete substances. These glands can be further classified into simple (unbranched ducts) and compound (branched ducts) glands, such as sweat glands or salivary glands.
Compare the structure: Unicellular glands consist of a single cell, while multicellular glands are made up of multiple cells organized into a structure, such as tubular or alveolar shapes.
Compare the secretion process: Unicellular glands release their secretions directly onto the surface or into a lumen, whereas multicellular glands often use ducts to transport their secretions to the target site.
Contrast their locations and examples: Unicellular glands, like goblet cells, are typically found in epithelial linings, while multicellular glands, such as sebaceous glands or the pancreas, are more complex and found in various tissues and organs.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Unicellular Glands
Unicellular glands consist of a single cell that performs the function of secretion. An example is the goblet cell, which secretes mucus in the respiratory and digestive tracts. These glands are typically found embedded within epithelial tissues and are responsible for localized secretion, playing a crucial role in protecting and lubricating surfaces.
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Unicellular Exocrine Glands - Goblet Cells
Multicellular Glands
Multicellular glands are composed of multiple cells that work together to produce and secrete substances. They can be further classified into exocrine glands, which secrete their products into ducts, and endocrine glands, which release hormones directly into the bloodstream. Examples include salivary glands and the thyroid gland, respectively, highlighting their diverse functions in the body.
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Comparison of Gland Types
The primary difference between unicellular and multicellular glands lies in their structure and complexity. Unicellular glands are simpler and consist of a single cell, while multicellular glands are more complex, involving groups of cells organized into tissues. This structural difference influences their secretion mechanisms, functional roles, and the types of substances they produce, impacting overall physiological processes.
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Related Practice
Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Fibroblasts store lipids in a large inclusion in their cytoplasm.
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Textbook Question
Compare and contrast the following pairs of terms:
Holocrine secretion and merocrine secretion
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Loose connective tissue features protein fibers as its primary component.
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Keratinocytes begin life in the stratum corneum and gradually are pushed into the stratum basale.
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Textbook Question
Compare and contrast the following pairs of terms:
Endocrine gland and exocrine gland
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