_____ attack foreign cells or body cells infected by viruses by direct contact,
ID: 100334 • Letter: #
Question
_____ attack foreign cells or body cells infected by viruses by direct contact, and are said to confer cell, mediated immunity on the body tissues they defend. A) Helper T cells B) NK cells C) Suppressor T cells D) B cells E) Cytotoxic T cells cells can differentiate into plasmocytes, which are responsible for the production and secretion of _____ A) lymphocytes B) antibodies D) platelets E) antigens Large granular lymphocytes are also known as _____ A) NK cells B) memory B cells C) suppressor T cells D) cytotoxic T cells E) plasmocytes. A typical B cell spends about _____ in a lymph node before moving to another location. A) 20 minutes B) 12 hours C) 30 hours D) 1 week E) 2 months Lymphopoiesis is the production of lymphocytes and it occurs in both the bone marrow and the _____. A) spleen B) liver C) thymus D) lymph nodes E) thyroid In diffuse lymphoid tissue, lymphocytes are loosely aggregated within connective tissues of the _____. A) central nervous system B) respiratory or urinary tracts C) reproductive and urinary systems D) digestive system E) peripheral nervous system Large lymphoid nodules in the wall of the pharynx, which are not visible due to their location at the base of the tongue, are called _____. A) palatine tonsils B) Peyer's patches C) pharyngeal tonsils D) lingual tonsils E) aggregated lymphoid nodules collect antigens from the lymph and present them in their cell membranes. A) Lymphocyte B) Dendritic cells C) plasmocytes D) Erythrocytes E) MicrogliaExplanation / Answer
32. Option B is correct. NK cells (natural killer) cells are a type of lymhocytes which attack on foreign cells or body cells infected by virus.
33. Option B is correct. B cell plasmocytes are white blood cells which release large amount of antibodies.
34. Option A is correct. Large granular lymphocytes are a type of white blood cell which contains granules with enzymes that can kill tumor cells or microbial cells and are also known as natural killer cell or NK cell.
35. Option C is correct. A typical B cell spent about 24-30 hrs in a lymph node.
36. Option C is correct. B lymhocytes are produced in bone marrow while T lymphocytes are produced in thymus.
37. Option D is correct. Diffuse lymphatic tissue is particularly found in the connective tissue that underlies the epithelium of the intestine.
38. Option D is correct. The lingual tonsils are two small mounds of lymphatic tissue situated at the back of the base of the tongue.
39. Option B is correct. Dendritic cells are antigen representing cells.
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