T cells that react with self antigens are destroyed through: A. cytokinesis b. macrophages c. perforins d. apoptosis

Q: Concerning the adaptive immunity, which of the following statements is CORRECT:  a. The adaptive…

A: The adaptive immune response does not occur very rapidly. Unlike the innate immune response, which…

Q: Identify the function of the Purkinje fibres. Select one: O a. O b. O c. O d. act as a pacemaker and…

A: The conducting system of heart consists of SA node, AV node, Right and left AV bundles, purkinje…

Q: Which of the following is part of the second line of defense against pathogens? a. skin b. mucus…

A: The immune system is made up of special organs, cells and chemicals that fight infection (microbes).…

Q: Humoral immunity is the part of the adaptive immune system involving: A.cytotoxic T cells killing…

A: The adaptive immune system is also known as acquired or specific immune system. It is a subset of…

Q: John frequently encountered bacterial infections. Tests for immune cells showed the presence of…

A: Complement cascade is the part of innate immunity that consists of lot of proteins acting in a…

Q: Contrast the specific functions of helper T cells, suppressorT cells, and cytotoxic T cells.

A: Human body has an extremely well developed immune system for the protection against pathogens. Human…

Q: Describe the main functions of T cells. What are the main types of effector T cells and their…

A: T cells also known as T lymphocytes, are part of the immune system and are one of the most important…

Q: The following events occur in humoral immunity, leading to an activated B cell in a T dependent…

A: Humoral immunity is a crucial component of the immune system that involves the production of…

Q: Describe how T cells are activated during the development of a specific immune response. e.i. After…

A: Helper T-cells invigorate B-cells to develop antibodies and help executioner ( killer )cells create.…

Q: An experimental animal is given a drug that blocks phagocytosis. Will this drug prevent the animal’s…

A: The immune system is the system that provides protection against the foreign bodies or disease…

Q: If you were missing the gene sequence that codes for CD3, what consequence would this have on T…

A: Cells that exclusively exhibit certain cell types' as cell surface markers are biological molecules…

Q: The following are steps in the cell-mediated inflammatory response. Put them in the correct order.…

A: Cell-mediated immunity is an immune response resulting from the activation of cells of immune-system…

Q: Which of the following cells is critically important in mounting an adaptive immune response?

A: Adaptive immune response is the response that is acquired by the body after exposure to a disease…

Q: Which of the following triggers or enhances an inflammatory response? Select one: a. lysozyme Ob.…

A: answer :  The one which can enhance an inflammatory response is  Option : e) Cytokines

Q: Organize the following steps in order of antibody production. A. CD40L-CD40 interaction turn on…

A: The process of antibody production begins with the activation of a CD4 T cell by a dendritic cell…

Q: .

A: There are two types of the T cells based on the glycoprotein attached , these are CD4 cells and the…

Q: CHAPTER 21 The Respiratory System SECTION 1 Revi ew Labeling 6. 10 11 12 14 bet 15 13 16

A: The organ system of the human body through which exchange of gases occurs between the body and the…

Q: Describe how antigen-presenting cells stimulate an increasein the number of helper T cells. Why is…

A: Helper T cell, also called CD4+ cell, T helper cell, or helper T lymphocyte, type of white blood…

Q: Which of the following links the Innate immune system to the adaptive? a. Cytokines b. APC cells c.…

A: INTRODUCTION Antigen presenting cells This is atype of phagocyte. These cells shows antigens on…

Q: All of the following are actions of the complement system except: O a. decreasing fever O b.…

A: Immunity is a resistance of our body against the invading pathogenic agent. It is also considered as…

Q: The T-cell antigen receptor is similar to immunoglobulin molecules in that it: a. can cross the…

A: Antigens are any foreign bodies that enter the human body. The body has an immune system that…

Q: An antigen must be considered: a. An antibody b. To produce cytokines c. Foreign d. A T lymphocyte

A: Our Immune system is capable of fighting with the antigen. Immune system has many cells that help us…

Q: what cell provides cell mediated immunity a. monocytes b. b lymphocte c. cytotoxic t cells d.…

A: Cell-mediated immunity is one branch of adaptive immunity. Other branch of adaptive immunity is…

Q: To become a fully activated, antibody-secreting cell, B cells usually need: a. to encounter an…

A:

Q: The detrimental effects of Lupus erythematosis are initiated by A. activated T cells attacking…

A: Lupus erythematosus: It is an auto-immune disease, in which the human immune system kills its own…

Q: Two of the major actions of complement are a. increased inflammatory response and cytolysis. b.…

A: The complement system gets activated when it comes in contact with the antibody molecule that is…

Q: Antigen-presenting cells make contact with T-cells via cellular junctions. Which of the following is…

A: There are different cell junctions that are present between the cells that help in cell…

Q: What are the roles of the innate immune system? Select all that apply.   A. identity self vs.…

A: Pathogens are disease-causing organisms that can cause humans to become ill or die depending on the…

Q: A 55-year-old male was diagnosed with rheumatoid arthritis (RA) after experiencing complications…

A: Rheumatoid arthritis is an autoimmune disease. An autoimmune disease refers to when the body's…

Q: In what process is tumor necrosis factor (TNF) not involved?a. chemotaxis of phagocytesb. fever c.…

A: Tumor necrosis factor (TNF) is produced by macrophages, lymphocytes, and other immune cells as an…

Q: Cancer cells evade immune surveillance. What "strategies" can cancer cells use to escape NK cells?

A: Cancer is a condition caused by uncontrolled cell division.

Q: Which of the following is NOT an explanation to the body's normal lack of mature lymphocytes that…

A: Lymphocytes develop in the Central lymphoid organ such as thymus and bone marrow. The main  criteria…

Q: Which of the following does not accurately describe complement components?   A. made by the spleen…

A: The complement system is the major effectors of the humoral branch of immune system; this is the…

Q: Synthesis of antibodies is part of: a. Innate immunity b. Adaptive immunity c. Active Passive…

A: The resistance exhibited by the host towards injury caused by micro-organisms and other products is…

Q: List 3 things that helper T cells do:

A: Thymus is the site where T-lymphocytes get mature. T-lymphocytes arises in bone marrow. when t-cells…

Q: Suppose a person recovers normally from viral infections, but then gets the same viral infections…

A: The B-lymphocytes or the B-cell and the the T-lymphocytes are t-cells are very important for the the…

Q: Which of the following cell types can directly regulate B cell activation and differentiation? 單選:…

A: The stimulation of the Th1 clones with immobilised anti-CD3 mAb greatly boosted the proliferation of…

Q: Which of the following describes the developmental pathway for T cells? a. thymus → bone marrow →…

A: A type of leukocyte that plays an important role in the immune system refers to the T cell. T cells,…

Q: A naive T cell is migrating from the blood into a lymph node and first rolls along high endothelial…

A: T-lymphocytes are produced from the bone marrow and maturated in the thymus. They express T-cell…

Q: Apoptosis is Select one: A. equivalent to necrosis. B. caused by T cell anergy. C. involved in…

A: Apoptosis is an important process in the regulation of normal cell growth and development. It is a…

Q: Name three types of T cells.

A: T cells are defined as the T lymphocytes that are a crucial part of the immune system in the human…

Q: The inflammatory process involves Select one: O A. Passive immunity, MHC proteins, and interferon.…

A: biological systems have different ways to respond to pathogens and other xenobiotics . inflammation…