STD 12 - 8. microbes in human welfare — NEET STD 11 Science — Question

Opium, morphine, heroin, pethidine and methadone are collectively called as

In which of the following the segmentation is best represented

‘Sporeine' is a

Which one of the following statements are correct ?
(i) Entamoeba histolytica is a protozoan parasite in large intestine of human which causes amoebiasis (amoebic dysentery) and fruitflies act as mechanical carriers for spread of this disease.
(ii) Wuchereria bancrofti and W.malayi causes elephantiasis or filariasis.
(iii) Many fungi belong to genera Microsporum, Trichophyton and Epidermophyton are responsible for ringworms. heat and moisture conditions help these fungi to grow in groin or between toes.
(iv) Fishes like Gambusia feed on the mosquito larvae in ponds.
(v) The overall ability of host to fight the disease is called immunity.
(vi) In cellular barriers of acquired immunity, certain types of WBC of our body like polymorpho-nuclear leukocyte and monocytes and natural killer in body as well as macrophages in tissue can phagocytose and destroy microbe.
(vii) The response produce by body when it encounter pathogen for the first time is called secondary response.
(viii) The secondary response due to encounter with same pathogen is called anamnestic.
(ix) Two types of lymphocyte present in our body are B-and T-lymphocyte.
(x) T-lymphocyte produces army of protein in response to pathogen called antibodies.
(xi) Each antibody molecule has 2 peptide chains.
(xii) Antibody molecule has 2 light chains and 2 heavy chains and hence antibody is represented as H.L.
(xiii) The immune response mediated by B-lymphocyte is called humoral immune response and by T-lymphocyte is called cell- mediated response.
Choose the correct option given below :-

Statement I: P wave in ECG represents the depolarization of the atria.
Statement II: QRS complex represents the repolarization of the ventricles.

Germ cells in mammalian gonads are produced by

The most active phagocytic white blood cells are

Match List-l with List-ll

List-l	List-Il
(A) CCK	(I) Pars nervosa
(B) GIP	(II) Heart
(C) ANP	(III) Inhibits gastric secretion and moility
(D) Vasopressin	(IV) Pancreas

Choose the correct answer from the options given below:

Patella is associated with