During which stage of life is the thymus most active?  A. Pregnancy  B. Adolescence .  C. Infancy O  D. Reproduction

Q: Jay, a young dad, takes his baby to the pediatrician several times in the first year of the child’s…

A: To explain: Why the visits of the baby to the pediatrician to stimulate to make memory cells against…

Q: Which is/are function(s) of the lymphatic system?   a. Hemopoiesis   b. Inspect lymph for…

A: The lymphatic system is considered as a part of the immune system that includes a network of lymph…

Q: One known function of the cells of the thymus is to a. produce and secrete antibodies b. produce…

A: The thymus organ, situated behind the sternum and between the lungs, it is active until adolescence…

Q: Which cytokine does not activate NK cells early in a viral infection? a. IFN-a b. IFN-b c. IFN-g d.…

A: Interferon alpha or a is produced due to leukocytes infected with virus. Interferon beta or b…

Q: Although interferons have several effects, they are particularly useful against infections with…

A: Answer is b.)  viruses.

Q: One-year-old Matthew always seems to be sick. When his blood is tested, there are no antibodies. The…

A: The lymphatic system consists of immune cells called lymphocytes. Lymphocytes are the primary cells…

Q: What change occurs to the adult lymphatic system as we getolder?a. The body produces and transports…

A: The lymphatic system is a collection of lymphatic vessels, lymph (a clear fluid), lymph nodes, and…

Q: The acquired ability to prevent an unnecessary or destructive immune reaction to a harmless foreign…

A: Immune tolerance is significant for ordinary physiology. Central tolerance is the fundamental way…

Q: In what process is clonal selection important?a. Complement function c. Inflammationb. B cell…

A: Clonal selection is a process that explains how a single B or T cell that recognizes an antigen…

Q: The organ that contains red pulp, which filters the blood, andwhite pulp, where lymphocytes respond…

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

Q: Invading bacteria are recognized by neutrophils, which engulf the bacteria and form a packet within…

A: Neutrophils comprises of around 40% to 70% of the WBC(white blood cells). These are the most…

Q: The thymus is most active during a. Fetal development b. Childhood c. Middle age d. Old age

A: Thymus is primary lymphoid organ of the immune system. In the thymus, T cells (thymus cell…

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: What is the name of the white blood cell that would be triggered to attack unknown antigens? A.…

A: White blood cells, also known as leukocytes are the cells of the immune system that are involved in…

Q: Which of the following is a leukocyte AND a lymphocyte? A. macrophage B. natural killer cell C.…

A: Blood is composed of three types of cells Erythrocytes: which are red blood cells that carry oxygen…

Q: The immune system cell that binds to herpes infected cells and kills them are? A. Regulatory cells…

A: The immune system can be defined as the type of organ system which participates in protecting the…

Q: Describe the major functions of:  a. lymph nodes b. spleen  c. MALT  d. Thymus

A: Immunity is defined as the ability of an individual to fight against an infection or an disease.…

Q: Which cytokines will act on mast cells to cause degranulation and local inflammation? a. TNF-alpha…

A: Cytokines are an enormous group of peptides, proteins, or glycoproteins that are released by…

Q: A heart attack is a type of organ dysfunction. Is heart attack a type of sepsis? A. No, because a…

A: Sepsis - It is defined as the response to infection. Any infection can cause sepsis if it is not…

Q: What blood group has only A antigens on red cells? A. Group A B. Group AB C. Group O D. Group B

A: The ABO blood group system is the classification of human blood based on the inherited properties of…

Q: What is the function of MALT?  A. Identify foreign particles and initiate immune response B.  Filter…

A: Besides lymph nodes, spleen mucosal associated lymphoid tissue (MALT) is also considered as…

Q: Helper T cells produce _____________ t a. Enzymes b. Cytokines c. Antibodies d. Antigens

A: T lymphocytes (often called T cells) are one of the crucial types of lymphocytes and are a major…

Q: Select all of the organ systems that are directly part of our immune system? A Skolotol Svetom

A: The immune system is a complex system of cells, tissues, and organs that work together to defend the…

Q: B cells proliferate and differentiate into plasma cells and memory cells in the ______________ of…

A: INTRODUCTION Secondary lymphoid organ This include spleen, lymph node and payers patches.

Q: Which cells of the immune system secrete antibodies? A. Natural killer cells only B. T cells only C.…

A: The immune system helps prevent the entry of foreign substances into the body. The immune system…

Q: _____________-is an example of an inflammatory mediator that stimulateschemotaxis.a. Endotoxin b.…

A: If there is an injury in the cell in response to specific chemical responses the white blood cells…

Q: One of the postoperative complications from the removal of lymph nodes during a mastectomy would be…

A: Mastectomy is a part of medication for breast cancer. Mastectomy is surgery to extract a breast.…

Q: B cells are responsible for which conditions?a. asthma b. anaphylaxis c. tuberculin reactions d.…

A: BASIC INFORMATION B- cells They are basically the B lymphocytes. They release Immunoglobulin which…

Q: How do corticosteroids act to block inflammation? a. Blocking neutrophil migration b. Blocking…

A: Inflammation is caused due to the influx of granulocytes such as Eosinophils, basophils, and…

Q: ____________interferon, produced by T lymphocytes, activates cellscalled _____________ and is…

A: The immune system is a complex network of biological structures (cell) and protein that defends the…

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.…