3. Helper T cells can be activated by I. interacting with an infected cell expressing an antigen-MHC I complex. II. interacting with a macrophage expressing an antigen-MHC II complex. III. binding of their CD28 to B7 on antigen-presenting cells. A. I only B. II only C. I and II only D. II and III only E. I, II and III

Q: 21. The following is correct about superantigens? A. cause autoimmune disease C. activates B cells…

A: Introduction :- Superantigens (SAgs) are a group of antigens that cause the immune system to become…

Q: Match the cell type in column A with its description in column B.

A: Introduction: Immune cells are those cells that prevent our body from foreign particles and part of…

Q: Your patient who is recovering from a first time wound infection caused by Staphylococcus aureus.…

A: This is the Infections by the Staphylococcus  are the often that is the associated with the wounds,…

Q: When a surgeon conducts a cardiac bypass operation by transplanting a piece of vein from a patient's…

A: Grafts are defined as the removal of tissue from the individual body and placement elsewhere in the…

Q: Loss-of-function mutations in the common γ chain (γc) gene are particularly damaging to the immune…

A: The effect of genetic modification is termed "job-loss" in which the genetic product is reduced or…

Q: The reason why therapeutic anti-IgE is able to suppress allergic responses is that _____. a.…

A: The immune system is what protects your body from sicknesses and infections. It's the real system…

Q: The process of removing auto-reactive b and T cells during maturation is called: a. Clonal…

A: Clonal deletion is the removal through apoptosis of B cells and T cells that has expressed…

Q: 32. Antibiotics that affect various strains of Gram-positive bacteria and various strains of…

A: Note: According to bartleby guidelines only first question is to be answered. So please upload…

Q: 22. Your patient is born without B cells. He cannot a. fight off intracellular infections b. have a…

A: Here we have to describe if a patient is born without B cells what will happen or what she/he cannot…

Q: Primary immunodeficiency disorders A. are mostly caused by deficiency of both B cells and T cells.…

A: Primary immunodeficiency disorders (PIDDs) is a term given to disorders due to which the immunity of…

Q: A number of minor cancerous cells and infected viruses, such as Epstein Barr (EBV), are able to go…

A: Cytotoxic T cells or cytotoxic T lymphocytes are the type of T lymphocytes that plays a role in…

Q: 1. Which of the following is true about the clonal selection theory? Select one: a. An antigen…

A: Clonal Selection theory states that a particular antigen will activates its counter specific…

Q: T cells that secrete cytokines that help antibodyresponses are called ________.a. Th1b. Th2c.…

A: T cells are also known as T lymphocytes as they are produced and mature in the thymus. They are an…

Q: When the body is exposed to the same virus a second time, the immune response is Accompanied by…

A: Any foreign substances or pathogen can be harmful to an organism. Hence, the organism will develop…

Q: 14. Predominant cell types involved in the humoral immune response are: A. eosinophils. В.…

A: Answer No 14 -- Humoral Immunity -- There are two types of immune responses             ( i )…

Q: 10. A given B cell expresses only maternally or paternally derived heavy chains but never both. This…

A: Immunity is a phenomenon build up inside the body of an organism to fight against disease and…

Q: When first exposed to a foreign molecule, are the first class of antibodies generated a. cytokines…

A: The immune response is a set of responsive mechanisms carried out by the immune system of the body…

Q: The nucleus of B lymphocytes receives the signal indicating that the corresponding epitope was found…

A: The B lymphocyte (B cell) is indeed one of the body's most essential cells. By developing antibodies…

Q: 1. In central tolerance, 3 mechanisms deviate B cells away from making autoreactive antibody. Which…

A: These are multiple choice questions.

Q: ph nodes function to a. provide a site for lymphocyte reproduction b. anchor lymphatic vessels c.…

A: Lymph node is a small bean-shaped structure that is part of the body's immune system. There are…

Q: 1. Match the hypersensitivity reaction with the cause.…

A: Type  II        :     B)      Small molecules binding to human cells producing structures that…

Q: Which of the following are phagocytes? 1. Neutrophils II. Macrophages III. Natural killer cells

A: Phagocytes are a type of white blood cell that plays an important role in the body's immune system.…

Q: mty Match each lettered term with the most closely related description. a. opsonization 1 Two…

A: immune system protect the child's body from any external invaders. These invaders are germs,…

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 pertains to the immune response of a woman who has just inhaled a coronavirus to which she has…

A: Corona virus are a group of RNA viruses which causes disease in mammals and birds. They usually…

Q: 7. Which are important in nonspecific immune defenses? a. interferons b. lymphocyte activation c.…

A: The immune system is an organ system of the body that is functionally responsible for protecting the…

Q: MHCII molecules will bind __________ and locate to the cell surface. a. T-independent type antigens…

A: T cells are not able to recognize free antigens directly. They can recognise only antigens that are…

Q: Memory T cells _____. (Select all that apply.) a. must all be activated in secondary lymphoid…

A: Memory T cells are antigen-specific T cells that remain long-term after an infection has been…

Q: phagocytes?

A: Phagocytes: Phagocytes are a type of immune cells which surround and kill microorganisms. They…

Immune Disorders

The collaboration between the cells and proteins that work together as a defense system against infection comprises the immune system.Each of them performs a variety of tasks to recognize and/or react against a foreign body.