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NEET UG Human Health and Disease — practice questions — page 2

Explore 82 free Human Health and Disease questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Human Health and Disease questions and exercises with answers

Showing questions 31–60 of 82.

Which toxic substance, released when RBCs rupture, causes the chills and fever of malaria?Read the answer and worked solution →Inside the human body, where do malarial parasites multiply first?Read the answer and worked solution →In the mosquito, where are Plasmodium sporozoites stored?Read the answer and worked solution →Entamoeba histolytica, which causes amoebic dysentery, lives in the human:Read the answer and worked solution →Which insects act as mechanical carriers of the amoebiasis parasite?Read the answer and worked solution →Ascaris, an intestinal helminth, is commonly known as the:Read the answer and worked solution →Filarial worms usually live for years in which part of the body?Read the answer and worked solution →Which conditions help ringworm fungi thrive in skin folds such as the groin?Read the answer and worked solution →Which fish is introduced into ponds to feed on mosquito larvae?Read the answer and worked solution →Dengue and chikungunya are spread by which mosquito?Read the answer and worked solution →Stomach acid, saliva and tears belong to which innate immunity barrier?Read the answer and worked solution →The mucus coating lining the respiratory tract is which kind of barrier?Read the answer and worked solution →Interferons, which protect nearby non-infected cells, are secreted by:Read the answer and worked solution →Neutrophils, monocytes and natural killer cells form which innate barrier?Read the answer and worked solution →The highly intensified response on meeting the same pathogen a second time is called:Read the answer and worked solution →Antibody-mediated immunity is also called the:Read the answer and worked solution →Rejection of a transplanted organ is mainly caused by:Read the answer and worked solution →Which lymphocytes help B cells make antibodies but secrete none themselves?Read the answer and worked solution →Which type of immunity is slow and takes time to give its full response?Read the answer and worked solution →Injecting antitoxin into a tetanus patient is an example of:Read the answer and worked solution →Recombinant hepatitis B vaccine is produced using which organism?Read the answer and worked solution →Antibodies produced against allergens belong to which class?Read the answer and worked solution →Mast cells cause allergy symptoms by releasing:Read the answer and worked solution →Which group of drugs quickly reduces the symptoms of allergy?Read the answer and worked solution →Which pair are the primary lymphoid organs in humans?Read the answer and worked solution →Which bean-shaped lymphoid organ filters blood and stores erythrocytes?Read the answer and worked solution →Peyer's patches, a secondary lymphoid tissue, are found in the:Read the answer and worked solution →HIV belongs to which group of viruses?Read the answer and worked solution →Which enzyme converts the RNA genome of HIV into viral DNA?Read the answer and worked solution →The usual time lag between HIV infection and AIDS symptoms is:Read the answer and worked solution →

Worked practice questions

Which toxic substance, released when RBCs rupture, causes the chills and fever of malaria?

  1. Haemozoin
  2. Interferon
  3. Histamine
  4. Serotonin
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Correct answer: A. Haemozoin

Rupture of red blood cells by Plasmodium releases haemozoin, which brings on the chill and high fever.

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Inside the human body, where do malarial parasites multiply first?

  1. Liver cells
  2. Lymph nodes
  3. Red blood cells
  4. Bone marrow
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Correct answer: A. Liver cells

Plasmodium first multiplies inside liver cells and only then attacks red blood cells.

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In the mosquito, where are Plasmodium sporozoites stored?

  1. Ovarian tissue
  2. Malpighian tubules
  3. Midgut lining
  4. Salivary glands
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Correct answer: D. Salivary glands

Sporozoites collect in the mosquito's salivary glands, so they enter a human with the bite.

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