Question

58 Mechanisms that help regulate blood pressore inclode a. nervous control that operates via reflex ares involving baroreceptors chemoreceptors and higher brains receptors b. chemical receptors such as atrial natriuretic factors c. renal via the renin-angiostenin system, of vasoconstriction d. all of the above are correct 59. Which of the following is NOT a lymphoid organ? a. tonsils b. lymph nodes thyroid d spleen c. e. thymas 60. Which of these is not one of the cardinal signs of inflammation? a. redness b. fever c. swelling d. heat e. pain 61. All but which of the following are good barriers to invasion by microbes? a, mucous membranes c. broken skin b. eye secretions d. urine e. gut bacteria 62. Antibodies are a. b. steroids. proteins. c. polysaccharides c. all of these d. lipoproteins. Phagocytes are derived from stem cells in the spleen. b. thymus. 63. e. liver. d. blood. c. bone marrow a. Which cells produce antibodies? helper T 64. d. B cells c. cytotoxic T b. natural killer cells a. Four of the five answers listed below are targets of the immune system. Select the exception. a. viruses 65. b. normal cells d. bacteria e. debris and dead cells c. cancer cells Which cells directly destroy body cells infected by viral or fungal parasites? a. helper T c. cytotoxic T 66. b. natural killer cells e. B cells d. memory Before a B lymphocyte can secrete antibodies it must transform into a. a stem cells b. a plasma cell c. an antigen-presenting cell d. a T cell 67. against its own cells, the disorder is called b. anaphylactic shock. d. passive immunity When the body's defenses turn a. an autoimmune response. acquired immune deficiency syndrome inflammatory response. 68. c. e, an The antigen-binding sites of an antibody molecule are found a. on the light chains only c. at the tips of the constant regions 69. b. on the heavy chains only. d, at the tips of the variable regions are small organic molecules that are not antigenic by themselves, but can combine with proteins and render them antigenic. Light chains b. Helper factors 70 d. Haptens Pyrogens C. a. 71 When an antigen triggers the multiplication of B lymphocytes, some daughter cells transform into antibody-producing cells and mount an attack, while others become 11 d bolnor cells ventavcasas o ws er mimute the duns c. 1.2 ence heat rate? d. body temperature would primaiy

Answer 1

58-d mechanisms that help regulate blood pressure includes Automatic nervous system which regulates through sympathetic and para sympathetic nervous system.Blood pressure is raised or lowered as per the situation.Chemical receptors like ANF is also seen to regulate blood pressure whenever the flow is high, its alters the pressure to low down.RAAS system is hormone regulated which look after blood pressure and electrolytic balance.

59-c Thyroid is not a lymphoidal organ.The lymphatic system consists of spleen, bundle of lymph nodes.Thymus and tonsils also act as secondary lymphoidal organs.

60-b Five cardinal signs of inflammation are pain, heat, lack of movement, redness, and swelling

61-c Broken Skin is a good barrier for invasion of microbes because they can easily penetrate inside the body and cause infection.Rest other peovides immunity by their specific features.

62-a Antibodies are proteins that are made in our body in response to pathogen or antigen. These are Y in shape and provide role in immune system.

63-c Bone marrow is the organ where immune based cells are produced.Phagocytes are produced in red bone marrow.

64-d B cells are the immune cells that produce antibodies and help fighting from diseases.

65-b Normal cells are never the target of our immune response.Foreign cells like bacteria , virus , pathogens and dead cells are caught up by immune system.

66-c Cytotoxic cells destroy the Viral pathogens by direct attacking them.They are highly senstive to viral cells.

67-b Before B lymphocytes can produce antibodies it transforms into plasma cell .

68-a Auto immune response is a condition in which body's immune cells start attacking itself.

69-d the tips of variable regions has specified position that has been for antigen binding sites for antibody molecule.antigens bond to this site on antibody.

70- d Haptens are small molecules that can be combined with larger molecules like proteins to form antibodies. They are not antigenic as individual.