EBK BIOLOGY
5th Edition
ISBN: 9780133996807
Author: Maier
Publisher: PEARSON CUSTOM PUB.(CONSIGNMENT)
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Chapter 20, Problem 6LTB
Summary Introduction
Introduction:
Antigens refer to the substance which is foreign or external for the human body and arouses immune response either after forming a complex or alone with a larger molecule which has the capacity to bind T cell or antibody of the immune response.
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John frequently encountered bacterial infections. Tests for immune cells showed the presence of mature B and T cells in his blood. Extensive analysis showed that John was lacking a gene responsible for a protein for complement factor C5.
1. Which immune response will be inhibited because of C5 deficiency?
2. How would it affect John’s ability to fight infections? Specifically what type of infections is he likely to have difficulty fighting? Please explain in detail.
3. What would have been the implications if he was lacking the C3 complement component?
All of the following are necessary for a specific immune response except:
O a. red blood cells
O b. recognition of antigen
O c. antigen
O d. lymphocytes
Antibodies against a specific antigen can be injected into a person to provide passive immunity. For which reason is this NOT as effective as the process of vaccination with that antigen?
Select one:
a.
Injection of antibodies may cause allergic reactions, while vaccination never causes allergic reactions.
b.
Injection of antibodies does not provide long-lasting immunity, and vaccination with antigens triggers a clonal selection of B cells and cytotoxic T cells.
c.
Vaccination with antigens triggers a clonal selection of B cells and cytotoxic T cells.
d.
Injection of antibodies does not provide long-lasting immunity.
e.
Injection of antibodies does not provide long-lasting immunity and may cause allergic reactions, while vaccination never causes allergic reactions.
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- The T-cell antigen receptor is similar to immunoglobulin molecules in that it: a. can cross the placenta and provide protection to a fetus b. remains bound to the cell surface and is never secreted c. binds complement d. contains V and C regions on each of its chainarrow_forwardT cells that react with self antigens are destroyed through: A. cytokinesis b. macrophages c. perforins d. apoptosisarrow_forwardWhich of the following is not part of the innate immune system? a. Antibodies b. Skin c. Enzymes d. Neutrophilsarrow_forward
- Suppose a person recovers normally from viral infections, but then gets the same viral infections over and over again- unlike the rest of us. A. What is probably wrong –B cells, helper T cells and/or cytotoxic T cells? B. Should this person be at a higher risk of cancer than the rest of us? C. Should this person be able to lyse bacterial cells as well as the rest of us? D. Should this person tolerate a graft (from an unreated person) better than you are me?arrow_forwardHumoral immunity is the part of the adaptive immune system involving: A.cytotoxic T cells killing infected host cells B.neutrophils eating bacteria C.B cells making antibodies to target the invading pathogen D.Your skin cells protecting you from infection with the acidic pH on the surfacearrow_forwardAn antigen must be considered: a. An antibody b. To produce cytokines c. Foreign d. A T lymphocytearrow_forward
- An antigen-presenting cell (APC)a. presents antigens to T cells.b. secretes antibodies.c. marks each human cell as belonging to that person.d. secretes cytokines only.arrow_forwardA nurse caring for adults in a physician’s office notes thatsome patients age more rapidly that other patients of thesame age. The nurse researches aging theories that attempt to describe how and why aging occurs. Which statements applyto the immunity theory of aging? Select all that apply.a. Chemical reactions in the body produce damage to the DNA.b. Free radicals have adverse effects on adjacent molecules.c. Decrease in size and function of the thymus causes infections.d. There is much interest in the role of vitamin supplementation.e. Lifespan depends on a great extent to genetic factors.f. Organisms wear out from increased metabolic functioning.arrow_forwardWhich best describes the term "immunological disorder"? a. An exaggerated or inadequate immune response. b. A disorder that destroys the immune system. c. Any genetic disease. d. A complete lack of immune function. e. Immune problems that cause disease but cannot be detected.arrow_forward
- 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 erythrocytesarrow_forwardPart b pleasearrow_forwardAn antibody which is made against the first antibody is called a ........ antibodyarrow_forward
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