Textbook Question
Number the strata of thick skin epidermis from deepest (1) to most superficial (5).
____Stratum spinosum
____Stratum corneum
____Stratum basale
____Stratum lucidum
____Stratum granulosum
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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 Autonomous 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 Nutrition and Metabolism7
- Ch. 24 The Urinary System39
- Ch. 25 Fluids, Electrolytes, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Chapter 5, Problem 7c
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Dendritic cells are phagocytes of the immune system that protect the skin and deeper tissues from invasion by pathogens.
Verified step by step guidance1
Step 1: Understand the role of dendritic cells in the immune system. Dendritic cells are antigen-presenting cells that play a crucial role in initiating the adaptive immune response. They capture antigens and present them to T cells, but they are not primarily phagocytes like macrophages.
Step 2: Analyze the statement provided. The statement claims that dendritic cells are phagocytes of the immune system, which is incorrect. While dendritic cells can perform limited phagocytosis, their primary function is antigen presentation, not phagocytosis.
Step 3: Correct the false statement. The corrected statement should read: 'Dendritic cells are antigen-presenting cells of the immune system that protect the skin and deeper tissues from invasion by pathogens by capturing antigens and activating T cells.'
Step 4: Review the corrected statement to ensure it accurately reflects the function of dendritic cells and their role in the immune system.
Step 5: Confirm that the corrected statement aligns with the broader understanding of immune system functions, particularly the distinction between phagocytes (e.g., macrophages) and antigen-presenting cells (e.g., dendritic cells).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Dendritic Cells
Dendritic cells are a type of antigen-presenting cell found in tissues that are in contact with the external environment, such as the skin. They play a crucial role in the immune system by capturing and processing antigens, then presenting them to T cells to initiate an immune response. While they have phagocytic capabilities, their primary function is to act as a bridge between the innate and adaptive immune systems.
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02:10
The Epidermis: Cells Example 2
Phagocytosis
Phagocytosis is the process by which certain cells, known as phagocytes, engulf and digest pathogens and debris. This mechanism is essential for the immune response, as it helps eliminate harmful microorganisms and dead cells. Common phagocytes include macrophages and neutrophils, which are more directly involved in the clearance of pathogens than dendritic cells.
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2:19Phagocytosis
Immune System
The immune system is a complex network of cells, tissues, and organs that work together to defend the body against harmful invaders, such as bacteria, viruses, and parasites. It consists of two main components: the innate immune system, which provides immediate but non-specific defense, and the adaptive immune system, which develops a targeted response to specific pathogens. Understanding the roles of various immune cells, including dendritic cells, is vital for comprehending how the body protects itself.
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6:08Map of the Lesson on Cells of the Immune System
Related Practice
Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Merkel cells produce the pigment melanin.
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Textbook Question
What are the functions of the dermal papillae?
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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.
Melanocytes account for the bulk of the epidermis.
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Textbook Question
Keratinocytes in the superficial strata of the epidermis die because:
a. They are too far away from the blood supply in the dermis.
b. They are surrounded by a lipid-based substance that makes them more permeable to water.
c. They do not die.
d. No keratinocytes in the epidermis are alive.
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Textbook Question
Which of the following statements is false?
a. Thin skin lacks the stratum lucidum, whereas thick skin has all five epidermal layers.
b. Thick skin is located on the palms, the palmar surfaces of the fingers, the soles of the feet, and the plantar surface of the toes, whereas thin skin is located everywhere else.
c. Thick skin has numerous hairs, whereas thin skin lacks hairs.
d. Thin skin has a thin stratum corneum, and the other layers are thinner than what we find in thick skin.
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