6. The C1 complement protein is activated when it binds to the A. Fc region of an antigen-bound antibody. B. complement receptor of an antigen-bound lectin. C. Fc region of free antibody. D. complement receptor of free lectin. E. complement receptor on phagocytes.

Q: vaccination provides natural passive immunity A. True B. False 1e. Lymph nodes have several…

A: Answer 1a Toxoids and vaccine function similarly  True this statement is correct.  Answer 1b Active…

Q: A diagram of an antibody IgG molecule is given below. Indicate the locations of the following items…

A: An antibody (also called immunoglobulin) is produced by the immune system of our body that binds to…

Q: 28. The molecules mediating signal transduction on a B-cell following antigen binding to BCR are…

A: B cell It is a type of lymphocyte which is involved in providing the humoral immunity component of…

Q: 1. usually, what type of molecules are present in the peripheral SMAC? 2. usually, what type of cell…

A: ANSWER;- 1. In the center is the central supramolecular initiation complex or cSMAC, which contains…

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: An infected epithelial cell may present the antigen on its a. MHC class I molecules. b. MHC class II…

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

Q: Which of the following is not an example of a complement control protein? a. decay-accelerating…

A: Complement system- complement system refers to a series of more than 20 proteins circulating in…

Q: 6. B cells are most important in the _______ immunity type of _______ immunity.? .A.Cellular;…

A: Introduction :- The lymphocyte class known as B cells is in charge of the humoral immunity portion…

Q: Human leukocyte antigens (HLAs) are involved ina. cell-mediated immunity. d. complement.b.…

A: HLA stands for human leukocyte antigens. They are antigens and found on the surface of white blood…

Q: complement

A: Option D is answer .    The presentation of the antigens to the T helper cells for their activation…

Q: Regarding immune memory, which of the following is CORRECT:  a. immune memory only occurs after…

A: Note: Please note that in order to provide an accurate answer with explanation, and following the…

Q: 16. Expression of CD25 and CTLA-4 is a characteristic of? A. TH1 B. TH2 Treg

A: CD25 is a protein marker for CD4+ thymocytes. It hs actually the α-chain of the IL-2 receptor. CTLA4…

Q: Antibodies can have multiple mechanisms of action. The main mechanism is "flagging" a foreign body…

A: Antibodies are immunoglobulin proteins that are produced by the immune system as a result of the…

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: During the adaptive immune response, the role of helper T cells includes _____. Mark all that…

A: The adaptive immune response is the body's defense mechanism that learns and adapts to specific…

Q: The region of an antibody that is the antigen binding site is thea. constant region. b. variable…

A: Proteins that are Y-shaped that fight against the body’s foreign invaders are called Antibodies.…

Q: The five classes of immunoglobulin differ in ….   Select one: a. None of the above b. Ability to…

A: Immunoglobulins are the antibodies that are produced from B-lymphocytes of plasma cells.…

Q: 6. The function of allelic exclusion is an increase in the ................of antibodies?.…

A: Introduction :- One allele of a gene is expressed while the other allele is silenced through the…

Q: Describe how the immune system is able to produce receptors against a wide variety of antigens when…

A: Adaptive immune system :  As we know B cells and T cells ( white blood cells) are the part of…

Q: The INNATE defenses can tell the difference between SELF and NONSELF to a certain extent. EXPLAIN…

A: The ability of an organisms to resist a particular infection or toxin by the action of specific…

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: 1.Which of the following statements about antibodies is incorrect? a.Antibodies are secreted by…

A: An antibody (Ab), also known as immunoglobulin (Ig), is a large, Y-shaped defensive protein produced…

Q: Antibodiesa. prevent antigens from binding together.b. promote phagocytosis.c. inhibit…

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

Q: Dysfunctional repair of DNA double strand breaks often results in SCID because: thoose all that…

A: SCID stands for severe combined immunodeficiency disease.SCID is caused by adenosine deaminase (ADA)…

Q: Receptors that trigger innate immune responses a. are antibodies recognizing specific antigens.…

A: The first line of defense against invading pathogens is the innate immune response. They are also…

Q: When an immature dendritic cell becomes an activated dendritic cell, all of the following changes…

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

Q: Select all of the following statetments that apply to immunological memory:   A. A small…

A: Immunological memory refers to the immune system's capacity to react to infections more quickly and…

Q: The complement system a. consists of 20 blood proteins. b. is triggered by bacterial cell walls. c.…

A: Innate immunity provides the first line of defense against pathogens such as bacteria, viruses, etc.…

Q: 1. Name and briefly describe the function of three different classes of proteins that participate in…

A: 1) Three classes of proteins involved in recognition events to regulate immune responses are:…

Q: 4. Which of the following statements about antibodies is incorrect? A. Antibodies are secreted by…

A: Antibodies are the protein substances secreted from specialised cells called B cells. These…

Q: Adaptive immunity includes both humoral and cell-mediated immune responses, which interact but also…

A: The white blood cells (WBC) in our body are responsible for giving immunological protection.…

Q: MHC moleculesa. are glycoproteins.b. attach to the plasma membrane.c. have a variable region that…

A: MHC MOLECULES  ( e ) all of these are correct MHC ( major histocompatibility complex ) molecules are…

Q: How may B cells be activated? Select all that apply. Select one or more: a. Crosslinking of BCRS and…

A: How may B cells be activated?

Q: Which of the following is false about innate immune receptors? A. They are encoded by intact genes…

A: Innate immunity is the immunity that involves protective barriers. They prevent the entry of foreign…

Q: The following are characteristics of innate immune receptors except A. trigger immediate response…

A: Innate immunity is a nonspecific immune response having physical, physiological, cellular, and…

Q: CD1-restricted α:β T cells respond to lipid antigens of mycobacterial pathogens using all except…

A: Introduction  The cluster of differentiation (also known as cluster of designation or classification…

Q: (1) In antibody structure, where are can we find unique variable domains? A. at the tip of each…

A: Introduction :  Antigens are things that cause the immune system to create antibodies in response to…

Q: An MHC class II/antigen complex on the surface of an antigen-presenting cell (APC) binds to a T-cell…

A: The objective of the question is to understand the result of the interaction between an MHC class…

Q: The autoimmune attack on nAChR leads to a decrease in the number of available receptors due to…

A: Answer: Effectors of parasympathetic nervous system Effectors of somatic nervous system…

Q: Which of the following is NOT true regarding the alternative complement pathway? It can be triggered…

A: There are three types of complement pathways: Classical pathway Alternative pathway Lectin pathway

Immunology

Immunology is the division of science involved with the immune reactions occurring in living organisms. The organisms are accustomed to evolving internal defense mechanisms to evade the invasion of microbial pathogens. Diverse cells are connected with stimulating the immune responses, which produce inhospitable conditions to the microbes prompting their lysis and thus inhibits the multiplication of the pathogens. The immune system can distinguish the pathogens through the aid of cellular intercommunication and launch responses to destroy them.