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 7c
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.
Verified step by step guidance1
Step 1: Understand the role of NK (Natural Killer) cells in the immune system. NK cells are a type of lymphocyte that play a critical role in the innate immune response. They are cytotoxic cells that target and destroy abnormal cells, such as cancer cells and cells infected with viruses.
Step 2: Evaluate the statement provided. The statement claims that NK cells are cytotoxic cells that lyse and kill cancer cells and cells infected with certain viruses. This aligns with the known function of NK cells in the immune system.
Step 3: Determine whether the statement is true or false. Based on the description of NK cells, the statement is true because it accurately describes their function.
Step 4: If the statement were false, you would need to correct it. For example, if the statement incorrectly described NK cells as part of the adaptive immune system, you would correct it by stating that NK cells are part of the innate immune system.
Step 5: Conclude that the statement is true and does not require correction, as it accurately reflects the role of NK cells in lysing and killing cancer cells and virus-infected cells.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Natural Killer (NK) Cells
Natural Killer (NK) cells are a type of lymphocyte in the immune system that play a crucial role in the body's defense against tumors and virally infected cells. They are part of the innate immune response and can recognize and destroy compromised cells without prior sensitization, making them essential for early immune responses.
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Natural Killer Cells
Cytotoxic Activity
Cytotoxic activity refers to the ability of certain immune cells, such as NK cells, to kill target cells, including cancerous and infected cells. This process involves the release of cytotoxic granules containing perforin and granzymes, which induce apoptosis (programmed cell death) in the target cells, thereby eliminating the threat to the organism.
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4:27Review of Cytotoxic vs Helper T Cells
Immune Response
The immune response is the body's defense mechanism against pathogens, including viruses and cancer cells. It involves a complex interplay of various immune cells, signaling molecules, and mechanisms that work together to identify and eliminate harmful entities, ensuring the maintenance of health and homeostasis.
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6:59Primary and Secondary Response of Adaptive Immunity
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.
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
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.
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Textbook Question
Which of the following functions is/are performed by complement proteins?
a. Cell lysis
b. Opsonization
c. Enhancing inflammation
d. Only a and b
e. All of the above
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