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 Multiple Choice QuestionsMultiple Choice Questions

181.

Assertion : Mast cells in the human body release excessive amounts of inflammatory chemicals which cause allergic reactions.

Reason : Allergens in the environment on reaching human body stimulate mast cells in certain individuals.

  • If both Assertion and Reason are true and the reason is the correct explanation of the assertion

  • If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

  • If Assertion is true statement but Reason is false

  • If both Assertion and Reason are false statements


182.

Which of the following cytoplasmic granules contain histamine

  • Basophils

  • Acidophils

  • Eosinophils

  • Neutrophils


183.

Refractory period of a muscle fibre in mammals is

  • 0.8001 sec

  • 0.002 sec

  • 0.004 sec

  • 0.005 sec


184.

Squeezing of leucocytes out from the endothelium of capillaries to fight foreign agents. is known as

  • haemolysis

  • diapaedesis

  • phagocytosis

  • rouleaux


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185.

Which organ is considered as "Graveyard of RBC" where most of them are destroyed by macrophages

  • Red bone marrow

  • Spleen

  • Kidney

  • Intestine


186.

Which of the following is not immunised by triple antigen ?

  • Typhoid

  • Tetanus

  • Diptheria

  • Whooping cough


187.

Liver damage caused by excessive drinking of alcohol is called

  • hepatitis

  • dematitis

  • liver cirrhosis

  • liver diarrhoea


188.

The vector of the kala-azar is

  • Aedes sp

  • Anopheles stephenis

  • Culex fatigans

  • Phlebotomus sp


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189.

Which lg is produced in primary immune response

  • IgA

  • IgG

  • IgE

  • IgM


D.

IgM

IgM antibodies constitute the major component of the natural antibodies and is also the first class of antibodies produced during a primary antibody response. The IgM-type antibodies differ from other classes of antibodies in that they are predominantly produced by B1 cells, in the absence of apparent stimulation by specific antigens. In addition, IgM antibodies are mostly encoded by germline V gene segments and have low affinities but broad specificites to both foreign and self structures.


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190.

Only one of the following four ways through which AIDS can spread?

  • Infected needles and syringes

  • Through mosquito bites

  • Looking after AIDS patient

  • Shaking hands, coughing, sneezing, hugging


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