Which event happens first during cytotoxic T-cell activation?

Q: Which statement is true of autoimmunity? a. It involves misshapen antibodies. b. It refers to…

A: Immunity can be defined as the ability of an organism to fight against infections caused by a…

Q: Explain why each choice (a-d) is correct or incorrect. In clonal selection of B cells, which…

A: B cell expresses receptors ,that are specific to distinct antigen,  is determined before…

Q: What stimulates T-cell lymphocytes to undergo clonal selection?

A: Acquired immunity develops after birth. It is formed by B and T lymphocytes. B lymphocytes provide…

Q: Compare and contrast cytotoxic T cells and NK cells?

A: Both cytotoxic cells and NK cells are capable of killing foreign pathogens and also cancer cells but…

Q: Which characteristic is associated with passive artificial immunity?a. long-term protection duration…

A: Immunology is the branch of science which deals with the study of the immune system, immune response…

Q: Which is an autoimmune disease? A. Graves disease B. HIV disease C. HIV disease, type-1 diabetes,…

A: Autoimmune disease is a condition where immune system attacks our own body by mistake.In normal…

Q: A second exposure to a given foreign antigen elicits a rapid and pronounced immune response…

A: Immunity is the capability of the body to fight against foreign attack and maintain the persistence…

Q: decrease in the number of cytotoxic T cells would affect which type of immunity?

A: Immunity is the ability of multicellular organisms to outlast foreign microbes that are harmful to…

Q: Begins with : Question 32 What is the cause of host rejection of graft in an allograft transplant? O…

A: As per our policy we are answering the only one question. For the rest of the question kindly repost…

Q: .

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

Q: a. Describe the main elements of the process through which the immune system distinguishes self from…

A: The human leukocyte antigens (HLA) are used to identify self from non-self. As all the cells in…

Q: What is the main reason for the steady decline in T cells over time

A: Human Immunodeficiency Virus infections affect the immune system thereby directly affecting the…

Q: How might antibodies be used to activate B cells?

A: B cells also known as B lymphocytes are type of white blood cells and functions in humoral immunity…

Q: Which event happens last in a humoral immune response? 1) CD4 T cell activation 2) presentation of…

A: The correct option is (d) the production of antibodies.

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: What causes the delay in delayed hypersensitivity?a. inflammation b. cytokine releasec. recruitment…

A: Hypersensitivity involves the higher immune response towards an antigen or antibody. It is of four…

Q: Suppose a baby was born without a functional thymus gland. Could this child still produce…

A: ANTIBODIES:- These are glycoproteins which consist of two identical heavy polypeptide chains and two…

Q: What is the function of the blood-thymus barrier?a. It protects maturing T-lymphocytes from antigens…

A: The blood thymus barrier found in the cortex part of the thymus.

Q: A drug that were to inhibit the activity of T suppressor cells would lead to _______. a.…

A: Regulatory T cells (Tregs) also known as supressor t cell are a specialized subpopulation of T cells…

Q: Describe a mechanism by which an antigen can enter the lymph node and make contact with the B-cell…

A: The response of B-cell includes two events that take place in different regions and at different…

Q: Short Answer Use the diagram below to answer items 1-5. B cell engulfs pathogen antigen phagocyte…

A: T cells are formed in the thymus and are programmed to recognise only one foreign particle…

Q: in antibody-mediated immunity, what happens immediately after B cells are activated? a. the foreign…

A: The immune system of the body fights against foreign invaders and protect the body from infections.…

Q: Which of the following best describes the movement of a T cell through a lymph node? a. It enters…

A: T-cells are part of the cell-mediated immune system in humans. Lymph nodes are small bean-shaped…

Q: What is the function of Regulatory T-cells answer in one paragraph

A: Regulatory T cells develop in the thymus. These are also known as suppressor T cells.

Q: How is the cytotoxic T cell mechanism of action similar to that of complement? A. Cytotoxic T cells…

A: To neutralize antigen three possible ways are there: - Phagocytosis - ADCC (Antibody-dependent…

Q: Determine which statements are true about cytotoxic T-cells end out death vesicles that target and…

A: The term immunity is known as the capability of higher organisms to resist the harmful microbes…

Q: Compare the binding of MHC molecules to antigen with the binding of BCR to antigen.

A: The MHC(major histocompatibility complex) is a vast region of vertebrate DNA that contains a…

Q: In table form, differentiate Primary from Secondary Immune Response according to the ff. a. type of…

A:

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: Part 2. Identify each immune response as either humoral (H) or cellular (C). А. release of histamine…

A: The immune response is the body's way of recognising and defending itself against bacteria, viruses,…

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: What is the function of cytotoxic T-cells?

A: Acquired immunity develops after birth. It is provided by B and T lymphocytes.

Q: Select the correct one. In antibody-mediated immunity, what happens immediately after B cells are…

A: The antibody-mediated immunity involves the activation of T-helper cells that interacts with B cell…

Q: Microb Explain how CB8 T cells, CD4 T cells and B cells work together in the lymphoid tissues.

A: The type of cytotoxic T-cell expresses the CD8 co-receptor and is generated into thymus. These plays…

Q: Which of the following statements regarding T cells activated by specific antigen is incorrect? a.…

A: Lymphocytes are involved in adaptive immune responses.

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: Antibodies against a specific antigen can be injected into a person to provide passive immunity. For…

A: A very strong network of cells, organs, and tissues that guard the body against various infections…

Q: which product of inflammation is responsible for causing a fever? A- Platelet Activating factor B-…

A: Inflammation is presented with rubor, dolor, calor,tumor and functio lessa. Rubor= redness.…

Q: Predict which antigens will be most susceptible to antibody action

A: Antibodies, also known as immunoglobulins, are giant Y-shaped proteins that help the immune system…

Q: Unlike cytotoxic T lymphocytes, NK cells do not _____. (Select all that apply.) a. secrete…

A: Natural killer (NK) cells are lymphocyte that descend from the very same progenitor as T and B…

Q: After his recovery from chickenpox, which lymphocytes will keep this patient from becoming infected…

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

Q: Describe the process by which a B cell possessing a particular antigen receptor is expanded into a…

A: In immunology, the B cells are the antibody producing cell which is a part of the lymphocytes. The…

Q: T cells that react with self antigens are destroyed through: A. cytokinesis b. macrophages c.…

A: The T cells are one of two lymphocytes and play an important role in the immune system. B-cells are…

Q: Select best one. Which of these cell types aids the activation of T lymphocytes by antigens? a.…

A: We know that, Adaptive immunity is further classified as humoral and cell-mediated immunity. Humoral…

Q: How are innate lymphoid cells, including natural killer cells, distinguished from lymphocytes?

A: The immune system of the body is responsible for providing protection to the body when toxic…

Q: In the process shown in Diagram 2, what performs the function most similar to that of the activated…

A: The answer is given below.

Defense Mechanism

Circumstances influence and compel people to behave in a certain way. One such behavior is a defense mechanism. It is employed by people to escape from unpleasant circumstances, thoughts and actions. Defense mechanisms are, thus, psychological strategies that help to avert and avoid unwanted feelings such as guilt or shame and situations such as threat and danger.