Textbook Question
Which of the following is not a function of the integument?
a. Protection from mechanical trauma
b. Thermoregulation
c. Protection from acid-base imbalances
d. Vitamin D synthesis
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Ch. 5 The Integumentary System
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 5, Problem 2
Which of the following correctly describes the structure of the skin?
a. It consists of the superficial epidermis, middle dermis, and deep hypodermis.
b. It consists of the superficial epidermis and deep dermis.
c. It consists of the superficial dermis and deep epidermis.
d. It consists of the superficial dermis and deep hypodermis.
Verified step by step guidance1
Understand the basic structure of the skin, which is composed of three main layers: the epidermis (outermost layer), the dermis (middle layer), and the hypodermis (deepest layer, also known as the subcutaneous tissue).
Recognize that the epidermis is the superficial layer of the skin, primarily made up of keratinized stratified squamous epithelium, providing a protective barrier.
Identify the dermis as the middle layer, which contains connective tissue, blood vessels, nerve endings, sweat glands, and hair follicles. It supports the epidermis and provides elasticity and strength.
Note that the hypodermis is not technically part of the skin but lies beneath the dermis. It consists of adipose tissue and connective tissue, providing insulation and cushioning.
Review the options provided in the question and eliminate incorrect descriptions based on the anatomical structure of the skin. The correct answer should describe the skin as consisting of the superficial epidermis and deep dermis, without including the hypodermis as part of the skin.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Epidermis
The epidermis is the outermost layer of the skin, primarily composed of keratinized stratified squamous epithelium. It serves as a protective barrier against environmental hazards, pathogens, and water loss. The epidermis contains various cell types, including keratinocytes, melanocytes, and Langerhans cells, which contribute to skin color and immune response.
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The Epidermis: Layers Example 2
Dermis
The dermis lies beneath the epidermis and is much thicker, consisting of connective tissue that provides strength and elasticity to the skin. It contains blood vessels, nerve endings, hair follicles, and glands (such as sweat and sebaceous glands). The dermis is divided into two layers: the papillary dermis, which is more superficial, and the reticular dermis, which is deeper and denser.
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01:20Introduction to the Dermis
Hypodermis
The hypodermis, also known as the subcutaneous layer, is the deepest layer of the skin, primarily composed of loose connective tissue and fat. It serves as an insulator, helps to anchor the skin to underlying structures, and provides cushioning against external forces. The hypodermis plays a crucial role in energy storage and thermoregulation.
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02:44The Hypodermis
Related Practice
Textbook Question
You are working in the emergency department when paramedics rush in with an unconscious patient. You notice that the patient is wearing athletic clothing and the skin on his face and elsewhere on his body is bright red. The paramedics tell you that he was picked up after collapsing during a bike race. What does the color of the patient's skin tell you about the probable cause of his illness? Explain.
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Textbook Question
Explain why the skin is an organ.
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Textbook Question
Nguyen comes to your clinic with a mole that has recently changed in appearance. You examine the mole and note that its borders are irregular, it has a deep blue-black color, and the color is unevenly distributed throughout the mole.
What is your immediate concern? Why?
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