Textbook Question
Mark each statement as either true or false. Rewrite false statements to make them true by changing the underlined words.
__________ Lymphocytes with CD8 glycoprotein are helper T cells.
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Ch. 16 - Adaptive Immunity
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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Table of contents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Not the one you use?Change textbook
Chapter 16, Problem 4
Mark each statement as either true or false. Rewrite false statements to make them true by changing the underlined words.
__________ Cytotoxic T cells secrete immunoglobulin.
Verified step by step guidance1
Understand the role of Cytotoxic T cells: Cytotoxic T cells (also called CD8+ T cells) are primarily responsible for killing infected or cancerous cells, not for secreting antibodies.
Recall what secretes immunoglobulins: Immunoglobulins (antibodies) are secreted by B cells, specifically plasma cells, which are differentiated B cells.
Evaluate the statement: The statement 'Cytotoxic T cells secrete immunoglobulin' is false because Cytotoxic T cells do not secrete immunoglobulins.
Rewrite the false statement to make it true by replacing 'Cytotoxic T cells' with 'B cells' or 'Plasma cells': 'B cells secrete immunoglobulin.' or 'Plasma cells secrete immunoglobulin.'
Confirm the corrected statement aligns with immunology concepts: B cells/plasma cells produce antibodies, while Cytotoxic T cells kill infected cells.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Cytotoxic T Cells Function
Cytotoxic T cells (CD8+ T cells) are immune cells that kill infected or cancerous cells by releasing perforin and granzymes, not by secreting antibodies. Their primary role is cell-mediated immunity, targeting cells presenting abnormal antigens.
Recommended video:
Guided course
06:21
Functions of Cytotoxic T Cells (Tc)
Immunoglobulins (Antibodies)
Immunoglobulins are antibodies produced by B cells and plasma cells, not T cells. They recognize and bind specific antigens to neutralize pathogens or mark them for destruction by other immune cells.
Recommended video:
Guided course
00:48Antibodies
Differences Between T Cells and B Cells
T cells and B cells are lymphocytes with distinct functions: T cells mediate cellular immunity, while B cells produce antibodies for humoral immunity. Understanding their roles clarifies why cytotoxic T cells do not secrete immunoglobulins.
Recommended video:
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03:53Regulatory T Cells
Related Practice
Textbook Question
Mark each statement as either true or false. Rewrite false statements to make them true by changing the underlined words.
__________ Secretion of antibodies by activated B cells is a form of cell-mediated immunity.
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Textbook Question
The nearby image is a transmission electron micrograph of a dendritic cell. Indicate where a scientist could find molecules of MHCI and MHC II. Label a pseudopod and a vesicle.
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Textbook Question
Among the key molecules that control cell-mediated cytotoxicity are:
a. Perforin
b. Immunoglobulins
c. Complement
d. Cytokines
ie. Interferons
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Textbook Question
Which of the following lymphocytes predominates in blood?
a. T cells
b. B cells
c. Plasma cells
d. Memory cells
e. All are about equally prevalent
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Textbook Question
Rejection of a foreign skin graft is an example of:
a. Destruction of virus-infected cells
b. Tolerance
c. Antibody-mediated immunity
d. A secondary immune response
e. A cell-mediated immune response
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