Consider the events that occur in HIV infection. I. HIV undergoes molecular self assembly. II. The protein gp120 binds to CD4. III. The HIV genome is incorporated into the host cell genome. IV. Reverse transcriptase is activated. V. The lipid envelope of HIV fuses with the T cell membrane. What is the correct sequence of the numbered events? I > III > V > IV > II IV > II > I > V > III II > V > IV > III > I III > I > II > IV > V

Consider the events that occur in HIV infection. I. HIV undergoes molecular self assembly. II. The protein gp120 binds to CD4. III. The HIV genome is incorporated into the host cell genome. IV. Reverse transcriptase is activated. V. The lipid envelope of HIV fuses with the T cell membrane. What is the correct sequence of the numbered events? I > III > V > IV > II IV > II > I > V > III II > V > IV > III > I III > I > II > IV > V

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter42: The Immune System

Section: Chapter Questions

Problem 1VCQ: Figure 42.11 Which of the following statements about T cells is false? Helper T cells release...

See similar textbooks

Similar questions

Identify the mismatched pair. a. CXCR4: lymphocyte tropic b. exogenous retrovirus: originates outside host’s body c. infectious virion production: activated CD4 T cells d. tat: controls export of transcripts from the nucleus e. lentivirus: long incubation period f. CCR5: macrophage tropic.
Which of the following cells are primarily targeted by HIV?a. Nerve cells.b. Helper T celIs.c. Phagocytes.d. Cytotoxic T cells.
16. Which cell type assist and interact with both humoral and cell-mediated immunity? A. Macrophages B. Cytotoxic T cells C. Memory T cells D. Helper T cells 17. Which of these cells are involved in cell-mediated immunity by destroying virally infected cells and rejecting organ transplants? A. Natural killer cells B. B cells C. Macrophages D. Cytotoxic T cells 18. Identify the junction between an axon and another cell. A. Synapse B. Presypnaptic cell C. Postsypnaptic cell D. Neurotransmitter
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 the
HIV can be treated with therapy, but there is a growing in the level of innate immune activation despite control of T cells and a negligible viral load. Explain why you think this may happen?
What is the predicted outcome if a patient receives an allogeneic hematopoietic cell transplant from a family member, and then receives a kidney transplant several months later from the same donor? a. Acute kidney rejection because the patient’s hematopoietic system has been fully reconstituted with patient-derived alloreactive T cells and NK cells. b. Graft-versus-host disease mediated by alloreactive T cells in the transplanted kidney. c. Secondary immune response by patient-derived memory T lymphocytes that were initially activated by the hematopoietic cell transplant. d. The patient is tolerant to alloantigens on the kidney graft and does not require long-term immunosuppressive drugs.
Which of the following explains why dendritic cells, but not macrophages or B cells, contribute to the activation of naive T cells? a. Macrophages and B cells do not express MHC class II molecules until they are activated. b. Dendritic cells upregulate B7 after engaging innate immunity receptors at sites of infection. c. Dendritic cells express higher levels of CTLA4. d. Macrophages and B cells do not process antigen. e. Dendritic cells use Toll-like receptors to hold antigen in place for extended periods of time.
A number of minor cancerous cells and infected viruses, such as Epstein Barr (EBV), are able to go undetected by cytotoxic T cell degradation by what possible mechanism? a. the production of normal class I MHC molecule b. helper T cell activation c. the deactivation of the complement system d. tumor antigen expression e. the production of the class II major histocompatability (MHC) moledule
Which pertains to the immune response of a woman who has just inhaled a coronavirus to which she has no immunity. A.an immune response will begin once the antigen enters lymphoid tissues as the lymph nodes B. IgA directed toward this coronavirus will be immediately present in respiratory secretions C. each Ab produced against an epitope of the coronavirus will have identical binding sites D. only B lymphocytes will be capable of responding to the coronavirus E. only IgM will be produced in the initial response.
with HIV, explain the mechanism of intracellular infection and the role of reverse transcriptase. What would you explain about the process? What is the significance of the CD4+ count? ( Discuss the meaning of various ranges of CD4 counts.) List 5 opportunistic infections AND describe data to suggest whether or not a patient has such an infection.
The immune system includes the various responses the body uses to ensure survival in the presence of disease-causing agents. Identify the example of innate immunity. A. Infected host cells are killed by toxic proteins from cytotoxic T cells. B. Toll-like receptors bind to foreign molecule fragments to initiate immune response. C. CD4 accessory proteins on the helper T cell surface bind to class II MHC molecules. D. IgE antibodies recognize and attach to pollen grains, stimulating an allergic reaction.
Which of the following pairs is mismatched? a. plasma cell: mediation of phagocytosis and killing of microorganisms in the plasma b. megakaryocyte: formation of platelets c. dendritic cell: activation of adaptive immune responses d. natural killer cell: develops from a common lymphoid progenitor e. neutrophil: formation of pus f. regulatory T cell: inhibition of T-cell activity.