INTERESTING FACTS XII Std Biology-Zoology Chapter- XII Std Biology-Zoology Chapter- Human Health and Diseases . The sporozoite of the malarial parasite is present in ---- a) saliva of infected female Anopheles mosquito. b) RBC of human suffering from malaria. c) Spleen of infected humans.
d) Gut of female Anopheles mosquito. . Match the pathogens with respective diseases caused by them and select the correct match using the codes given below. A.
Leishmania donavani - i. Amoebiasis B. Wuchereria bancrofti - ii. Kala – azar C.
Trypanosoma gambiense - iii. Sleeping sickness D. Entamoeba histolytica - iv. Filariasis a) A-ii, B-iv, C-iii, D-i b) A-ii, B-iv, C-i, D-iii c) A-iii, B-i, C-ii, D-iv d) A-i, B-iv, C-iii, D-ii .
Paratope is an a) Antibody binding site on variable regions b) Antibody binding site on heavy regions c) Antigen binding site on variable regions d) Antigen binding site on heavy regions . Allergy involves a) IgE b) IgG c) lgA d) IgM . Spread of cancerous cells to distant sites is termed as a) Metastasis b) Oncogenes c) Proto-oncogenes d)Malignant neoplasm . AIDS virus has a) Single stranded RNA b) Double stranded RNA c) Single stranded DNA d) Double stranded DNA .
B cells that produce and release large amounts of antibody are called a) Memory cells b) Basophils c) Plasma cells d) killer cells . Given below are some human organs. Identify one primary and one secondary lymphoid organ. Explain its role.
Liver, thymus, stomach, thyroid, tonsils . Name and explain the type of barriers which involve macrophages. . What are interferons?
Mention their role. . List out chemical alarm signals produced during inflammation. .
Explain the process of replication of retrovirus after it gains entry into the human body. . Explain the structure of immunoglobulin with suitable diagram. .
What are the cells involved innate immune system? . What is vaccine? What are its types?
. A person is infected by HIV. How will you diagnose for AIDS? .
Autoimmunity is a misdirected immune response. Justify. . List the causative agent, mode of transmission and symptoms for Diphtheria and Typhoid.
. A patient was hospitalized with fever and chills. Merozoites were observed in her blood. What is your diagnosis?
. (i) Write the scientific name of the filarial worm that causes filariasis. (ii) Write the symptoms of filariasis. (iii)How is this disease transmitted?
. List the common withdrawal symptoms of drugs and alcohol abuse. . Why do you think it is not possible to produce vaccine against 'common cold'?
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