could be referred to as a specialized component of the circulatory system. vesse
ID: 3516729 • Letter: C
Question
could be referred to as a specialized component of the circulatory system. vessels in the blood vascular system, form a closed loop of circulation. resemble blood plasma in composition. True/ False Queestions 62. Lymphatic vessels, ike 63. Both lymph and interstitial fBuid closely r 64. Lymph has a clotting ability similar to that of blood. 65. The milky lymph found in lacteals after digestion Match the Folowing: is called chyle. A. Interferorn B. Regulatory T-cells 66 Small protein secreted by the virus-containing cells esajor innate mechanism that mediates destruction of foreign C. Complement D. Helper T-cells Substances in the body 68. Stimulate the proliferation of other lymphocytes 69. Dampen the activity of both T cells and B cells E. APCS Multiple Choice Questions 70. Which of the following is associated with passive immunity? A). Exposure to an antigen B). Infusion of weakened viruses. C). Passage of lgG antibodies from a pregnant mother to her fetus D) Booster shot of vaccines 71. Which of the following is not a type of Tcell A). Cytotoxic B). Antigenic C). Helper D). Regulatory 72. Interferons A). Are virus-specific, so that an interferon produced against one virus could not protect cells against another virus B). Act by increasing the rate of cell division C). Interfere with viral replication within the cells D). Are routinely used in nasal sprays for the common cold 73. Cytotoxic T cells A) Are the only cells that can directly attack and kill other cells B) Require the double recognition signal of 1 MHC plus 11 MHC on the target cell in other to function C) Function mainly to stimulate the proliferation of other T cell populations D) Self-destruct once the antigen has been neutralized
Explanation / Answer
70) Passive immunity is where the immune system does not have to synthesise it's own cells. Only in option C, the person recieves preformed antibodies and thus it is correct.
71) T cells contain four subcategory- T helper cells, T cytotoxic cells, T supressor cells aka T regulatory cells and T memory cells. T antigenic cells are not known. Thus option B is correct.
72) Interferons are host specific protiens secreted by virus infected cells to prevent other cells from getting infected. They stop viral multiplication by inhibiting the machinery responsible for protien synthesis. Thus option C is right.
73) Cytotoxic cells are activated by T helper cells and in turn these kill antigenic cells. Thus option A is true.
49) The SA node is responsible for initiating and maintaining cardiac muscle rhythm and is thus known as pacemaker of heart. Option A is right.
50) Electrocardiography aka EKG measures electrical activity of heart by the use of chest and limb leads. Option C is right.
51) Slower heart rate is called bradycardia while quicker heart rate is called tachycardia. Option A is right.
52) Heart, from outside to inside, is lined by pericardium, myocardium and endocardium. Thus inflammation of inner lining will be called endocardiaitis - option C.
53) The necrosis of cardiac tissue due to insufficient oxygen supply because of blockage in coronal system causes heart attack or myocardial infarction. Option B is right.
54) Embolus is a moving blood clot while thrombus is a stationary blood clot. Option C is right.
55) Option C is right. Maintaining fluid balance and providing a suitable environment to the immune cells for maturation are basic functions pf lymphatic system
56) Option B is true. Lacteals are responsible for absorption and transport of lipids since lipids are not soluble in blood. Lacteals contain lymph.
57) Option B is true. This may be remembered as a fact.
58) Option D. Lymphocytes are only produced in response to a specific antigen and target only that particular antigen.
59) Option C. Skin, mucus membraned of vagina, anal canal, nose, lysosymes in mouth- all form the first line of defense.
60) Option B. Responsible for specific immunity. B cells mediate antibody immunity and T cells mediate Antigen immunity.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.