Which of the following is not true for a natural killer cell? A do not undergo rearrangement of receptor genes B develop in the thymus stimulated (activated) by IFN-a and other cytokines (D lack of NK cells can lead to severe viral infections Question 6 Represents innate immune system receptors A Randomly arranged B Germline encoded cross-reactive CLP encoded (E) is determined by specific carbohydrate groups

Which of the following is not true for a natural killer cell? A do not undergo rearrangement of receptor genes B develop in the thymus stimulated (activated) by IFN-a and other cytokines (D lack of NK cells can lead to severe viral infections Question 6 Represents innate immune system receptors A Randomly arranged B Germline encoded cross-reactive CLP encoded (E) is determined by specific carbohydrate groups

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Helper T cells can be activated by macrophages(which engulf everything indiscriminately) or by B cells (which only engulf antigens that stick to their receptors). A. What properties so macrophages and B cells have ibn common that allows them both to activate T cells? B. It has been suggested that macrophages probably do most to fhte T cell activating in the primary response but B cells do most of it in the secondary response. Why does this make sense?
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Class I major histocompatibility complex molecules are found on O all anucleated cells. O antigen-presenting O all nucleated O None of the choices are correct. QUESTION 67 Important characteristics of antimicrobic drugs include O readily delivered to the site of infection. O high toxicity against microbial cells. O remains active in body tissues and fluids. do not cause serious side effects in humans. O All of these choices are correct. QUESTION 68 Antibodies O can bind to an immunogen. O are part of the nonspecific immune response. O can target the immunogen for destruction. O both can bind to an immunogen and can target the immunogen for destruction. O both can bind to an immunogen and are part of the nonspecific immune response.
In a specific type of tumor, cytotoxic T cells can recognize but not kill the tumor cell. Interaction of PD-L1 in tumor cells with PD1 in cytotoxic T cells plays a role in shaping the immune response by initiating signal transduction cascades in both cell types. What will happen if the signal transduction cascade in cytotoxic T cells is blocked? T cells will be activated and kill tumor cells T cells can recognize the cancer cells but will not be activated Tumor cell will undergo programmed cell death