Which of the following statements about interferons is false? Select one: O a. Interferons produced by a virus-infected cell will not save that cell from destruction. O b. Interferons produced by virus-infected rabbit cells cannot be used to treat viral diseases in humans. c. Interferons are virus specific. d. Interferons have been used to treat hepatitis C and certain types of cancer.

Q: Which of the following is NOT a function of the immune system?

A: A complex network of cells, organs and proteins that can defend the body against infection and which…

Q: Select the correct statement about active and passive immunity.

A: Immunity is the power of the organism that protects against disease-causing microorganisms or…

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: All of the following are necessary for a specific immune response except: O a. red blood cells O b.…

A: Immune response is the manner in which the body protects itself against substances it considers…

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: This chemical is released by virus-infected cells to decrease the spread of virus to nearby cells.…

A: Virus-infected cells release certain chemicals that work as immunity protection against viruses. It…

Q: Mark the following statements as true or false. If a statement is false, correct is to make a true…

A: A)  true B) false,  secondary immunue response is controlled by T- cells

Q: Decreased immunity is a symptom of HIV/AIDS. This is caused by which of the following? Select one:…

A: Acquired immunodeficiency syndrome (AIDS) is a spectrum of life-threatening conditions is caused by…

Q: Which of the following is a non-organ-specific (systemic) autoimmune disease? a. Systemic lupus…

A: Sure, here are the reasons why the other options are incorrect: b. Hashimoto's thyroiditis…

Q: Although interferons have several effects, they are particularly useful against infections with…

A: Answer is b.)  viruses.

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: Which of the following is a function of cytokines? A. Promote antibody invaders. B. Help T cells…

A: Cytokines : These are small proteins which are crucial in controlling the growth and activity of…

Q: Which of the following is not a function of antibodies? Select one: a. They neutralize pathogens by…

A: Introduction: The proteins that are produced in response to an antigen are called antibodies. It is…

Q: Which structure is not functioning properly if an electrical device is needed to stimulate the atria…

A: The heart has an electrical conduction system that consists of a highly constricted and controlled…

Q: Explain why each choice (a-d) is correct or incorrect.  A vaccine is effective because  a. The…

A: Vaccine contain weak or inactive parts of particular antigen that triggers an immune response…

Q: A nurse caring for adults in a physician’s office notes thatsome patients age more rapidly that…

A: Theories of aging are the attempt to explain the phenomenon of aging. Aging is the process that…

Q: The _____ is (are) the lymphoid organ(s) that filter(s) the blood. a. spleen b. tonsils c.…

A: The main lymphoid organs are the red bone marrow, within which blood and immune cells are made, and…

Q: Which is/are not part of innate immunity?a. phagocytic cells e. inflammationb. fever f. cytokinesc.…

A: The immune system covers the complex biological reactions that protect the body against invading…

Q: Explain why each choice (a-d) is correct or incorrect. B lymphocytes are categorized as part of the…

A: The immune system in our body is responsible for protecting us against foreign pathogens. The white…

Q: Which of these statements about T lymphocytes is false? a. Saome T cells promote the activity of B…

A: Lymphocytes are types of leukocytes. There are two types lymphocytes in immune system:…

Q: Which of these statements about gamma interferon is false? a. It is a polypeptide autocrine…

A: The interferon gamma is a dimerized soluble cytokine that is the only member of type II class of…

Q: Which of the following is a function of the spleen?a. produces T cellsb. removes worn-out red blood…

A: Step 1 Lymphoid organs are those organs that function as sites of formation, multiplication, and…

Q: Indicate whether the following questions are true (T) or false (F). a. Secondary immune responses…

A: When the body encounters an antigen, immune responses are produced. These immune responses can be…

Q: Which of the following statements is true? *   a. All of the statements are true. b. Lymph from the…

A: We know that The lymph node is a part of the lymphatic system. Generally, the lymph node is…

Q: Which of the following is not correct concerning interferon?a. Interferon is a protective protein.b.…

A: Answer- Interferons are the proteins that are secreted from the viral infected cells.

Q: Indicate to which branch(es) of the immune system the following statements apply, using H for the…

A: The human body may aim its defense against dangerous agents including bacteria, viruses, and poisons…

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: Some strains of the human papilloma virus (HPV) are resistant to interferons. If HPV can inhibit…

A: Interferons will bind to the virus to neurtralize it. is the correct answer

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: Which of the following is not used as a treatment for autoimmune diseases? Select one: A. Anti-IL2…

A: A defense system in the body of an individual which constitutes a complex network of cells and…

Q: Which of the following is not a function of antibodies? Select one: a. They neutralize pathogens by…

A: The immune system uses antibodies, often referred to as immunoglobulins, to recognize and destroy…

Q: Which event happens first during cytotoxic T-cell activation?

A: INTRODUCTION;-  The activation of cytotoxic T cell is dependent on several simultaneous interactions…

Q: Which of the following are true of interferons? Select all that apply. O They are a critical part of…

A: In the inflammatory response to infections, interferons (IFNs) are proteins produced by a number of…

Q: Explain why each choice (a-d) is correct or incorrect.  Which of the following examples below…

A: An autoimmune disease is a condition in which your immune system erroneously attacks your body. The…

Q: What's the interior of a lymph node, consisting of lymphatic sinuses, called ?  A. Capsule  B.…

A: Lymph is a colourless or yellowish fluid present in the lymph vessels. In real sense, it is the…

Q: Which of the following statements is correct?a. Lymphatic vessels do not have valves.b. Lymphatic…

A: The lymph system is not a closed system. Lymph flows in one direction toward the heart. Lymph nodes…

Q: Select the correct answer for each question.  Explain why each choice (a-d) is correct or incorrect.…

A: The adaptive branch of the immune system depends heavily on B cells. They assist focused defense…

Q: A young child is hospitalized with recurring bacterial infections, although she appears to make…

A: Humoral immune deficiencies are the conditions which are caused by the impairment of humoral…

Q: Which of these is an example of innate immunity?a. Tears and saliva wash away microorganisms.b.…

A: Humans are always surrounded by microorganisms searching for an opportunistic host. These pathogens…

Q: What structure covers the exterior of a lymph node?   A. Cortex   B. Lymphoid follicles  C. Capsule…

A: Lymph node is the bean shaped or kidney shaped organ of the lymphatic system and also the adaptive…