Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
d.Interleukin-1 is a cytokine that prevents viral replication in infected cells.
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Ch. 20 The Lymphatic System and Immunity
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 20, Problem 7b
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Phagocytic cells of innate immunity include NK cells and basophils.
Verified step by step guidance1
Step 1: Understand the role of phagocytic cells in innate immunity. Phagocytic cells are specialized cells that engulf and digest pathogens, debris, and other harmful particles. Examples include neutrophils, macrophages, and dendritic cells.
Step 2: Analyze the statement provided. The statement claims that NK (natural killer) cells and basophils are phagocytic cells of innate immunity.
Step 3: Recall the functions of NK cells and basophils. NK cells are part of innate immunity but are not phagocytic; they destroy infected or cancerous cells by inducing apoptosis. Basophils are also part of innate immunity but are involved in releasing histamine and other chemicals during allergic reactions and inflammation, not phagocytosis.
Step 4: Determine the accuracy of the statement. Based on the functions of NK cells and basophils, the statement is false because neither NK cells nor basophils are phagocytic.
Step 5: Correct the false statement. A true statement would be: 'Phagocytic cells of innate immunity include neutrophils, macrophages, and dendritic cells.'
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Innate Immunity
Innate immunity is the body's first line of defense against pathogens, consisting of physical barriers and immune cells that respond quickly to infections. It includes various cell types, such as phagocytes, which engulf and destroy foreign invaders. Unlike adaptive immunity, innate immunity does not require prior exposure to a pathogen to be activated.
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Innate Immunity
Phagocytic Cells
Phagocytic cells are a type of immune cell that can engulf and digest pathogens and debris. Key examples include macrophages and neutrophils, which play a crucial role in the innate immune response. These cells recognize, ingest, and destroy harmful microorganisms, helping to prevent the spread of infection.
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05:33Cell Junctions
Natural Killer (NK) Cells
Natural Killer (NK) cells are a subset of lymphocytes that play a vital role in the innate immune system by targeting and destroying infected or cancerous cells. Unlike phagocytes, NK cells do not engulf pathogens; instead, they release cytotoxic substances that induce apoptosis in their targets. They are essential for early defense against viral infections and tumor surveillance.
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6:53Natural Killer Cells
Related Practice
Textbook Question
Which of the following does not describe the relationship between the lymphatic and immune systems?
a. Lymphoid organs and tissues house cells of the immune system.
b. Lymphoid organs and tissues trap pathogens for the immune system.
c. Lymphoid organs activate cells of the immune system.
d. Lymphoid organs and tissues create the surface barriers of the immune system.
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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.
NK cells are cytotoxic cells that lyse and kill cancer cells and cells infected with certain viruses.
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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.
Fever is generated by pyrogens that reset the temperature set point of the hypothalamus to a lower value.
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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.
Surface barriers contain substances in their secretions that kill pathogens and deter their growth.
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Textbook Question
Which of the following make up the body's first line of defense?
a. Surface barriers
b. Cells and proteins of adaptive immunity
c. Cells and proteins of innate immunity
d. All of the above
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