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

Which of the following cytoplasmic granules contain histamine

• Basophils

• Acidophils

• Eosinophils

• Neutrophils

Refractory period of a muscle fibre in mammals is

• 0.8001 sec

• 0.002 sec

• 0.004 sec

• 0.005 sec

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

• haemolysis

• diapaedesis

• phagocytosis

• rouleaux

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

• Red bone marrow

• Spleen

• Kidney

• Intestine

Which of the following is not immunised by triple antigen ?

• Typhoid

• Tetanus

• Diptheria

• Whooping cough

Liver damage caused by excessive drinking of alcohol is called

• hepatitis

• dematitis

• liver cirrhosis

• liver diarrhoea

The vector of the kala-azar is

• Aedes sp

• Anopheles stephenis

• Culex fatigans

• Phlebotomus sp

Which lg is produced in primary immune response

• IgA

• IgG

• IgE

• IgM

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