m.sc. chapter objective test 01

8/13/2019 M.sc. Chapter Objective Test 01

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M.Sc. class Chapter Test: cells and organs of immune system Full Marks: 60

All questions are compulsory and carry equal marks

1. General functions of the lymphatic system includeA) fluid and nutrient transportB) lymphocyte developmentC) the immune responseD)all of the above2. How much excess interstitial fluid must the lymphatic system return to the bloodstream

each day?

A) less than 500 milliliters

B) up to 1 liter

C) about 3 liters

D) between 4 and 5 liters

3. Which selection includes all the major components of the lymphatic system?A) lymphatic cells and structures, lymph, and lymph vessels

B) thoracic duct, right lymphatic duct, and lymph

C) lymphocytes, lymph, and lymph nodes

D) spleen, thymus, and tonsils

4. A systematic defense against antigens, initiated by lymphatic cells, is calledA) a cross-reaction

B) inflammation

C) septicemia

D) an immune response

5. Which one of the following statements is false?A)blood pressure forces fluid out of capillaries into the interstitial spacesB)"leaked" fluids can be returned to the blood only by lymphatic vesselsC) lymphatic vessels return excess interstitial fluid to the venous circulationD)blood volume would drop precipitously without the lymphatic drainage

6. Which of the following is false in comparing lymphatic vessels with small veins?A)both have valves within the lumenB)both contain the same three tunicsC)pressures in lymphatic vessels exceed those in veinsD)contraction of nearby skeletal muscles helps propel fluids through both

7. The two largest lymph-collecting vessels are theA)cisterna chyli and thoracic ductB)thoracic duct and right lymphatic ductC) left subclavian trunk and right lymphatic duct
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D) left jugular trunk and right subclavian trunk8. Which sequence correctly traces the flow of lymph from lymphatic capillaries in the right

thigh to the left subclavian vein?

A) lymphatic vessels, lymphatic trunks, cisterna chyli, thoracic ductB) cisterna chyli, lymphatic vessels, lymphatic trunks, thoracic ductC) femoral lymphatic vessels, right lymphatic duct, thoracic ductD) right lymphatic duct, lumbar lymphatic vessels, thoracic duct

9. Lymphatic cells include all of the following exceptA) macrophagesB) dendritic cellsC) neutrophilsD) lymphocytes

10.T-lymphocytes mature in the ____________, while B-lymphocytes mature in the____________.

A) yellow bone marrow; red bone marrowB) thyroid follicles; bone marrowC) bone marrow; thymusD) thymus; bone marrow

11.All of the following are types of T-lymphocytes exceptA) helperB) plasmaC) suppressorD) memory

12.About 70-85% of the body's lymphocytes areA) T-lymphocytesB) plasma cellsC) NK cellsD) B-lymphocytes

13.Which lymphocytes initiate and oversee the immune response?

A) memory B-lymphocytesB) helper T-lymphocytesC) cytotoxic T-lymphocytesD) natural killer cells

14.Helper T-lymphocytes secrete chemical signals called ____________ that bind toreceptors on other lymphatic cells and activate them.

A) coreceptorsB) antibodiesC) immunoglobulinsD) cytokines

15.Each type of T-lymphocyte has a particular ____________ in its plasma membrane thatrecognizes a specific antigen.

A) surface antibodyB) coreceptorC) alpha-receptorD) beta-receptor

16.Plasma cells produce and secreteA) antibodiesB) antigens


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C) cytokinesD) alpha-globulins

17.Which one of the following would respond to multiple antigens?A) cytotoxic T-lymphocyteB) memory T-lymphocyteC) NK cellD) plasma cell

18.Lymphopoiesis, the process of lymphocyte development and maturation, occurs inA) the spleen and liverB) red bone marrowC) the thymusD) both b and c

19.A fully mature lymphocyte that is ready to participate in the immune response is said tobe

A) immunocompromisedB) immunocompetentC) antigenically primedD) facilitated

20.Oval clusters of lymphatic cells with some extracellular matrix but no connective tissuecapsule are called

A) lymph nodesB) lymphatic sinusesC) lymphatic nodulesD) medullary sinuses

21.The large clusters of lymphatic nodules found in the throat are calledA) Peyer patchesB) tonsilsC) lymph nodesD)

lymph glands

22.Large groups of lymphatic nodules in the mucosa of the gastrointestinal, respiratory,genital, and urinary tracts are collectively called

A) MALTB) Peyer patchesC) germinal centersD) mucosal lymph nodes

23.Which set includes only lymphatic organs?A) lymphatic nodules, tonsils, Peyer patchesB) thymus, lymph nodes, spleenC) lymph nodes, tonsils, MALTD) tonsils, spleen, thymus

24.Clusters of lymph nodes are found in which of the following body regions?A) axillaryB) cervicalC) inguinalD) all of the above

25.The thymus is a lymphatic organ thatA) is divided into four lobes by its connective tissue capsuleB) reaches a maximum weight of 30-50 grams at puberty


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C) is located in the posterior mediastinum, inferior to the heartD) remains functional throughout adulthood, especially after age 40

26.Several thymic hormones are secreted by ____________ in the cortex of the thymus.A) nurse cellsB) thymic corpusclesC) trabeculaeD) macrophages

27.What occurs in the thymus?A) production of large quantities of antibodiesB) activation of the immune response by circulating antigensC) T-lymphocyte maturation and differentiationD) all of the above

28.The spleen performs which of the following functions?A) initiates an immune response when antigens are detected in the bloodB) stores erythrocytes and platelets and hemolyzes old, defective onesC) phagocytizes bacteria and foreign debris from the bloodD) all of the above

29.Which one of the following does not accurately describe the spleen?A) surrounded by a capsule composed of dense irregular connective tissueB) divided into an outer cortex and an inner medulla by fibrous trabeculaeC) white pulp contains clusters of lymphatic cells encircling central arteriesD) red pulp contains splenic cords and sinusoids with numerous macrophages

30.With advancing age the lymphatic system loses effectiveness inA) providing immunity and fighting diseaseB) transporting lymph to the bloodstreamC) absorbing dietary lipids from the small intestineD) all of the above

m.sc. chapter objective test 01

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