Which of the following is a characteristic of a cytotoxic T cell?   Question 7 options:   A)  They originate in bone marrow.   B)  They have antibodies on their surfaces.   C)  They are responsible for the memory response.   D)  They recognize antigens associated with MHC I.

Q: How can an extracellular bacterium be targeted by a particular T cell response? Describe the…

A: T cells (also called T lymphocytes) are one of the major components of the adaptive immune system.…

Q: What is the function of MHC? Which cells make MHC I, and which make MHC II? What WBCs can present…

A: MHC stands for Major Histocompatibility Complex. These are the group of genes that code for…

Q: What is the basis of immunological memory?

A: Definition :- Immunological memory refers to the ability of B and T cells to produce long - lived…

Q: What are the mechanisms used by B cells to generate antibody diversity?

A: Antibodies are immunoglobulins produced in response to an antigenic stimulation. They mai either…

Q: Why does the immensely powerful immune system of the body, an organ system that has evolved over…

A: Human immune virus (HIV) is a retrovirus which attacks the immune cells of the body. It affects the…

Q: What is Helper T cells?

A: Step 1 The immune system has two types of about trillion lymphocyte cells, called B-lymphocytes and…

Q: In the absence of thymus, where does the maturation of t cells occur ?

A: B lymphocytes and T lymphocytes are two important immune cells that take part in acquired immunity…

Q: What is the difference between humoral and cellular immunity?

A: Introduction Immunity: it is the property/capability of our system to fight against the harmful…

Q: Please answer fast Which type of cells normally drive class switching to IgE and how? How might the…

A: Answer

Q: Explain the two processes by which B-cells are activated to inactivate an antigen?

A: B cells are activated mainly by either of the two processes -  PROCESS 1-  B cells are activated…

Q: Which type of T-cell activates a macrophage to greater killing power in the presence of an…

A: A T cell is a type of lymphocyte, which develops in the thymus gland (hence the name) and plays a…

Q: What is the difference between natural and acquired immunity?

A: Immunity is the ability of the body to defend itself against disease causing organisms.   Everyday…

Q: Which antibody class is the first produced during a primary response?

A: Answer: Introduction: Antibody is also known as immunoglobulin, a protein formed by the immune…

Q: Using the letters from column B, match the cell description in column A. (Note that all require more…

A: Different immune cells are involved in mediating protection to the host against the pathogen. There…

Q: Which of the following statements best characterizes interferons?

A: Answer ; Option (A) is right. - Interferons are a nonspecific defense used to respond to viruses. -…

Q: What is the role of helper T-cells ?

A: In immunology, the term helper T cell, which is also known as the CD4-positive cell, is used to…

Q: What is the difference between a T-cell-dependent and T-cell- independent response?

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

Q: What is Passive Immunity ? When does it occur ?

A: When ready made antibodies or directly given to protect the body against foreign agent so to provide…

Q: The activation of a CD8-positive T lymphocyte requires presentation of antigen in association with…

A: CD8 positive T-cells are the cytotoxic T-cells of immune system which get activated when specific…

Q: All of the following are true of some or all complement proteins except _____. a. they are soluble…

A: The complement system is part of the immune system which involves specialized proteins that aid the…

Q: What types of antigens are displayed by MHCclass I molecules? By MHC class II molecules?

A: An antigen is a substance that allows the immune system to generate antibodies against it. This…

Q: Where are B-cells and T-cells formed? How do they differ from each other?

A: B cells and T cells are lymphocytes that are derived from specific types of stem cells called…

Q: What are some examples of innate defense mechanisms that are chemical in nature? What is complement?

A: The immune system is complex and is made up of few organs and a broad network of cells and proteins…

Q: What is the difference between T cells and B cells?

A: Immune cells are the defense cells that protect the body from infective agents. The cells of the…

Q: Many cells in the human body have proteins on the surface that are able to interact with the…

A: Introduction  Autoimmunity is defined as the inability of the body to distinguish between self and…

Q: What are MHC class I and class II receptors and how do they recognize foreignness

A:

Q: What are the components of acquired immunity?

A: Immunity refers to the ability of the organism to recognize and differentiate between the self and…

Q: What is the role of the primary lymphoid organ in adaptive immunity?

A: The body has special organs and mechanisms that aid in the defense against infection-causing agents;…

Q: Acquired or adaptive immunity can be divided in to Natural Active, Natural Passive, Artificial…

A: Introduction: Adaptive immunity, also known as protective immunity, is the third line of defense…

Q: principle components and functions of innate and adaptive (

A:

Q: Which type of T cell is most important in both cellular and humoral immunity?

A: There are two main mechanisms of immunity within the adaptive immune system – humoral and cellular.…

Q: What are the different types of T cells, and what function does each have?

A: Introduction :- T cells are produced by stem cells in the bone marrow and are a component of the…

Q: Which of the following statements are true about antibodies? I. They are produced by the B cells.…

A: Often our body fights against infections by producing certain molecules. These molecules called…

Q: Which type of T cell is most important in both cellular and humoral immunity? Why?

A: T cells or T lymphocytes are a sub population of lymphocytes that are produced in the bone marrow…

Q: what is the importance of complements in cellular and humoral mediated immunity?

A: The complement system which is also known as the complement cascade enhances or promotes the ability…

Q: The correct order of words to describe how innate immune response responds to a pathogen that has…

A: Immune system is categorized into two types. They are innate and adaptive immunity. Innate  immunity…

Q: Which of the following is not involved in first line defense? a-Mucus membranes b-Saliva c-Sweat…

A: Introduction :- The mouth, nose, eyelids, trachea (windpipe), lungs, stomach, intestines, ureters,…

Q: How does the body produce so many highly diverse antibodies to respond to essentially any possible…

A: Antibodies (Ab) or Immunoglobulins (Ig) are large diversities of ‘Y’ shaped glycoprotein molecules.…

Q: The classical complement pathway involves activation of the complement proteins in which of the…

A: Complement system is a cascade that assists the antibodies and phagocytes to clear off…

Q: What evidence led Emil von Behring to discover antibodies and the complement system in 1905?

A: Antibodies, also known as immunoglobulins, are protein molecules produced by the body's immune…

Q: What is the role of antigen-presenting cells and TH cells in triggering/activating adaptive…

A: What is the role of antigen-presenting cells and TH cells in triggering/activating adaptive…

Q: How can the anamnestic response be explained in immunologic terms?

A: The immune system of the human body is divided into innate immunity and the adaptive immunity.…

Q: What is adaptive immunity ?

A: Immunity is a complicated biological system with the ability to recognise and tolerate what belongs…

Q: Which type of MHC-class molecule is found on all nucleated cells and is used to communicate with…

A: Introduction: The MHC (major histocompatibility complex) is a group of genes that encodes for a set…

Q: What are the functions of Cytotoxic T cell markers?

A: T lymphocytes are the important cells in the cell-mediated immune response. There are different…

Q: If a series of genetic mutations prevented some, but not all, of the complement proteins from…

A: Innate and adaptive immune responses are both parts of the immune system. Innate immunity develops…

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.