Which of the following is a function of the thymus?a. production of red blood cellsb. secretion of antibodiesc. production and maintenance of stem cellsd. site for the maturation of T lymphocytes
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Which of the following is a function of the thymus?
a. production of red blood cells
b. secretion of antibodies
c. production and maintenance of stem cells
d. site for the maturation of T lymphocytes
Step by step
Solved in 2 steps
- match the cytokine with its description. 1.Interleukin-1 2.Interleukin-2 3.Interleukin-12 a. Stimulates formation of TH1 helper T lymphocytes b. Stimulates ACTH secretion c.Stimulates proliferation of cytotoxic T lymphocytes d.Stimulates proliferation of B lymphocytesWhich of the following can NOT be found in the lymph node? a. Lymph follicle b. White pulp c. Cortex d. T cells e. B cellsWhich of the following statements regarding the lymphatic system is not true? A. Lymph originates from excess cellular fluid B. Lymph nodes trap bacteria C. Swelling of the lymph nodes indicates dysfunction of the lymphatic system D. Swelling of the lymph nodes indicates proper functioning of the lymphatic system
- Explain why each choice (a-d) is correct or incorrect. Which statement is true about T cells? a. They usually directly recognize antigens, which then activates a subpopulation of killer cells b. Their proliferation is enhanced by interleukins 1 and 2. c. Once activated, they cannot secrete cytokines. d. They will develop into cytotoxic T cells if antigen is complexed with class II MHC proteins.For an autoimmune disease to occur, lymphocytes do not learn how to recognize foreign pathogens as dangerous and self-antigens as safe. What is the second thing that needs to happen specifically with lymphocytes to have an autoimmune disease? O a. Malfunctioning lymphocytes attach to macrophages O b. Malfunctioning lymphocytes are not destroyed by the body O c. Malfunctioning lymphocytes prevent normal lymphocytes from reproducing O d. Malfunctioning lymphocytes trigger the complement system to initiate an immune responseWhich of the following characteristics apply to T lymphocytes?a. mature in bone marrowb. mature in the thymusc. Both a and b are correct.d. None of these are correct.
- The germinal center of a lymph node a. Is the location of B cells undergoing clonal expansion b. Is the location of plasma cells c. Is the location of B cells that have not yet contacted their antigen d. In a micrograph, Is the light-colored center of an activated lymphoid follicleWhich of the following best describes the movement of a T cell through a lymph node? a. It enters via efferent lymphatics and exits via the bloodstream. b. It enters via afferent lymphatics and exits via the bloodstream. c. It enters via the bloodstream and exits via afferent lymphatics. d. It enters via the bloodstream and exits via the bloodstream. e. It enters via the bloodstream and exits via efferent lymphatics.which two of following statements are true for an antigen prsent cell such as dendritic cell? a. Phagocytes are extra cellular pathogens b. Display processed pathoic peptide on the surface of the cell c. Produce antibodies specific for a pathogen d. Activate naive erythrocytes
- CHAPTER 20 The Lymphatic System and Immunity Matching SECTION 3 Revie w Match each lettered term with the most closely related description. a. opsonization 1 b. helper T cells Two parallel pairs of polypeptide chains Found on helper T cells C. antibody d. class II MHC 3 Active and passive 4 Transfer of antibodies e. costimulation Attacked by HIV f. IgM 6 Enhances phagocytosis g. class I MHC h. IgG 7 MHC proteins present in the plasma membranes of all nucleated cells i. passive immunity j. anaphylaxis 8 Differentiate into memory and plasma cells 9 MHC proteins present in the plasma membranes of all APCS and lymphocytes 9 k. CD4 markers 10 I. acquired immunity 10 Antibodies used to determine blood type 11 m. B lymphocytes 11 Secondary binding process required for T cell activation 12 12 Accounts for 80 percent of all immunoglobulins 13 13 Circulating allergen stimulates mast cells throughout body Match each lettered term with theWhich of the following is both a phagocyte and an antigen-presenting cell? a. NK cell b. eosinophil c. neutrophil d. macrophageWhich of following is not a type of T lymphocyte? a. Helper T cell b. Memory T cell c. Cytotoxic T cell d. Mast T cell
