Which of the following is the most likely future outcome for a thymocyte just entering the thymus?     A)  activation by a B-cell   B)  apoptosis   C)  differentiation into a Tc cell   D)  migration to a lymph node    E)  formation of a granuloma

Q: The first exposure of a person to an allergen results in the production of the IgE class of immut…

A: In the immune response, mast cells are essential, especially during allergic responses. During a…

Q: 1) Which line of defense are these immune response components part of? A) Complement: B)…

A: Immune system helps in protection of organism against disease.Immune system helps in detection and…

Q: 2. A 65-year-old man has a carcinoma. Study of the neoplasm shows absence of class I MHC molecules…

A: Introduction:-  Normal cells for express MHC 1 on them which helps in showing self tolerance to the…

Q: Differentiation of B cells into Ab-producing plasma cells occurs in the: a) Lymph nodes b) Spleen c)…

A: B cells or B lymphocytes, which are produced from bursae, are important components of the adaptive…

Q: The first cell type active in the innate response is usually a(n)       A) phagocyte.…

A: The innate immune system is the first line of defence in the body.

Q: Which of the following is not true about the complementsystem?(a) It is a set of more than 20…

A: The complement system is otherwise known as complement cascade and is associated with the immune…

Q: Which of the following statements are correct regarding NK cells? a)they are present in the blood…

A: Natural Killer (NK) cells are considered the cells of the innate immune system. It is a type of…

Q: DiGeorge syndrome is the result of the absence or immaturity of the thymus gland at birth. This…

A: The immune system of the body consists of immune cells which is responsible for removing the foreign…

Q: neither

A:

Q: Which of the following is part of the T-cell clonal deletion process? a) T-cells are eliminated if…

A: T cell clonal deletion means deletion of B & T cells through the process of Apoptosis ( program…

Q: Which of the following is NOT true of Innate Lymphoid Cells (ILCs)? A) Each ILC type responds to a…

A: Innate lymphoid cells are immune cells that mirror the phenotype and function of T cells. It…

Q: it states that IgA deficiencies are the most common, affecting 1 in 400 people, and I was wondering…

A: The immune system produces an antibody class known as IgA or immunoglobulin A. It is essential for…

Q: Interferons are considered as ______ signals IL-2 is considered as ________ signals IL-1 is…

A: Signaling molecules are small molecules, ions, or even gas that can either cross the lipid bilayer…

Q: Which statement is incorrect regarding Type IV Hypersensitivity? O A) T-helper cells are activated…

A: Contact dermatitis takes place when the skin comes in contact with an allergen directly. It results…

Q: An allergic reaction is an example of:

A: An allergic reaction is an example of:

Q: All of the following cells directly incorporate antigens into their structures, EXCEPT: A). Antigen…

A: The immune system is a defensive system in a host consisting of widely distributed cells, tissues,…

Q: SELECT ALL THAT APPLY ** Which of the following statements regarding the thymus is true? a) Its…

A: The thymus is an organ of the immune system that is larger and more active during infancy and early…

Q: The brain can sense cytokines released by peripheral immune cells through the following means EXCEPT…

A: Cytokines are small proteins produced by cells of the immune system in response to infection,…

Q: Which of the following is not a characteristic of memory B cells a.) Secretion of a large amount of…

A: Memory B cells are a type of long-lived immune cell that develop after an initial exposure to an…

Q: B-cell activation requires ____ b) antigens binding only c) antigen binding, antibody production,…

A: The immune system of the body play a major role in defending against the pathogenic invaders such as…

Q: A 40-year-old man with a complement deficiency agrees to participate in a clinical study of immune…

A: Introduction: The complement refers to a system of non-specific proteins found in normal human and…

Q: 1- B cell clones undergo somatic hypermutation in which structure? Group of answer choices A) Thymic…

A: Progenitor cells are types of stem cells that are able to differentiate into specialized cell types.…

Q: Superantigensa) are exceptionally large antigen molecules.b) cause a very large antibody response.c)…

A: Super antigens can activate up to 20% of the body's total T-cells concentration.

Q: What statements are correct about the innate immune system?

A: Immunity is the ability of organisms to cease a certain type of infection or toxin with the help of…

Q: Why should B cells residing in the mucosa-associated lymphoid tissues produce IgA?

A: Antibodies are glycoprotein molecules that are concerned with the Humoral immune response of the…

Q: A table comparing the biological characteristics of the five classes of immunoglobulins is shown…

A: Immunoglobulins are also called as antibodies which are made by white blood cell (WBC)

Q: What is the appropriate response when antigen is presented on MHC class II molecules?a) An effector…

A: APCs stands for antigen-presenting cells. They are a large group of a variety of cells that trigger…

Q: Granzyme and perforin are used by what cell type in the immune system to carry out its function? O…

A: Immune system of the body contains several types of cells that are involved in cellular function…

Q: BCR and TCR (alpha/beta) development share which of the following properties? a) Receptor assembled…

A: Option e) is correct, i.e., all of these features are shared.The following characteristics are…

Q: ic T cells can kill virus-infected cells. ic T cells respond to antigen bound to MHC class I…

A: T lymphocytes are a type of lymphocyte. T cells are one of the immune system's most important white…

Q: Which is not applicable to innate immunity? A) O It is faster than adaptive immunity in responding…

A: Immune system is system which helps our body to fight against the foreign substances which will…

Q: A 28-year-old woman comes to the physician because of a 1-week history of painful, red skin spots.…

A: Leukocytoclastic vasculitis (LCV) is a rare inflammatory condition that affects small blood vessels.…

Q: Which of the following determine what specific antigens B cells can recognize and bind? a) The type…

A: The immune cells are the defense cells that protect the body from invaders. The cells of the immune…

Q: What do rubor, calor, tumor, and dolor mean?  What is the cause of each in the inflammatory process?

A: Rubor, calor, tumor, and dolor occurs when inflammation occurs in the body. Inflammation refers to…

Q: A flu-infected cell has down-regulated its MHC class I expression. The lymphocytes below comes to…

A: MHC class I molecules: These are cell surface recognition elements. These are expressed on virtually…

Q: The circulating cytokines that recruit large numbers of phagocytes to the area of inflammation,…

A: Phagocytes are cells that are capable of engulfing foreign antigens such as microbes, toxins, and…

Q: The nurse is conducting a class on drugs for malignant tumors for a group of new oncology staff…

A: Interferons (IFNs) refer to a class of signaling glycoprotein molecules that are produced by host…

Q: 13. Which of the following statements about interferons is correct? a) The local release of…

A: As per Bartlebby guidelines, an expert cannot answer more than one question at a time, kindly post…

Q: Please answer all parts, thank you!) 1) Mature red blood cells contain hemoglobin for transporting…

A: Here i discussed about the questions related to virus.

Q: The classical sign calor, associated with inflammation, is the result of what physiological event…

A: Inflammation is basically the reaction of the immune system against any foreign antigens. The white…

Q: Activated helper T Cells participate in which of the following processes? a.) Differentiation of…

A: Helper T cells or CD4+ T-cells are a type of T-cell that play an important role in the adaptive…

Q: Of the following, which should NOT occur in order to facilitate T-cell selection in the thymus?…

A: T-cells are the part of immune system that kills the foreign pathogen in specific manner. It is…

Q: you need a flu shot every year/season because (HA-haemoagglutinin; NA-neuroaminidase) A) the virus…

A: The viruses are constantly changing. So to keep yourself protected it is utmost important to get…

Q: Which lymphatic structure is impostor palpate? A) axillary nodes B) popliteal nodes C) inguinal…

A: The lymphatic system is essentially a drainage system that is associated with the venous system.…

Q: Which of the choices is required to activate a helper T cell, which in turn can stimulate antibody…

A: Major histocompatibility complex contains a set of polymorphic genes which codes for cell surface…

Q: When an antigen complex is bound to a Class I MHC molecule, it can stimulate a A) B cell. B) plasma…

A: MHC or major histocompatibility complex molecules are glycoproteins which are encoded in a large…

Q: In a normal individual, a T cell that interacts with a self-antigen in the thymus will more than…

A: Introduction  Immunity is the property or ability of the body to defend against the pathogens.…

Q: 88. A 19-year-old woman undergoes a PPD skin test prior to entering college. A 15-mm, firm area of…

A: PPD (Purified Protein Derivative) skin test is a common method for detecting tuberculosis (TB)…

Q: Select the best answer or answers from the choices given: Complement fixation promotes all of the…

A: The immune system provides protection against pathogens such as viruses, bacteria, and other foreign…