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Human health and Disease Quiz-19

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NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1. Main barrier which prevents the entry of disease’s causing organism in our body is
  •  Skin
  •  Saliva
  •  Lymphocytes
  •  Interferons
Solution
Skin on our body is the main barrier, which prevents entry of the microorganisms. Mucous coating of the epithelium lining the respiratory, gastrointestinal and urogenital tracts also help in trapping microbes entering our body

Q2. A new born baby who receives IgA form its mother’s milk develops
  •  Naturally acquired active immunity
  •   Artificially acquired active immunity
  •  Naturally acquired passive immunity
  •  Artificially acquired passive immunity
Solution
The type of antibody present in colostrum secreted by mammary gland during the initial days of lactation is IgA. The acquisition of the antibodies in colostrum by an infant is an example of (naturally acquired) passive immunity

Q3. Active immunity may be produced by
  •  Contacting a disease
  •  Readymade antibodies
  •  Both (a) and (b)
  •  Receiving gamma glubulin infection
Solution
When a host is exposed to antigens which may be in form of living or proteins, antibodies are produced in the host body. This type of immunity is called active immunity

Q4. Salmonella is related with
  •  Typhoid
  •  Polio
  •  TB
  •  Tetanus
Solution
Typhoid is caused by a rod-like motile bacterium named Salmonella typhi.

Q5.The intermediate host of the parasite that causes Tashkent ulcers is
  •  Glossina palpalis
  •  Phlebotomus argentipes
  •  Phlebotomus papatassi
  •  Triatoma infestans
Solution
 P. papatassi is an intermediate host, causes Tashkent-ulcers.

Q6. The Philadelphia chromosome is found in the patients suffering from
  •  Albinism
  •  Hepatitis
  • Insomnia
  •  Leukaemia
Solution
Leukaemia is blood cancer. It is charaterized by abnormal increase of White Blood Corpuscles (WBCs) count due to their increased formation in the bone marrow. Philadelphia chromosome is found in patients suffering from leukaemia.

Q7.In the immune system, interferons are part of
  •  Physiological barriers
  •  Cellular barriers
  •  Physical barriers
  •  Cytokine barriers
Solution
Physiological barriers like body temperature, pH of the body fluids and other body secretion prevent growth of several disease causing microorganisms. Certain kinds of cells, When infected with a virus release interferons (glycoproteins). Interferons (IFNs) make the cells resistant to viral infections

Q8.What is the main lymphoid organ where all blood cells including lymphocytes are produced?
  •  Bone marrow
  •  Tonsils
  •  Liver
  •  Spleen
Solution
Blood cells are made in the bone marrow. Erythrocytes or red blood cells, are constantly being produced and released from marrow tissue. Leukocytes or white blood cells are also produced in the bone marrow. B-cells are leukocytes that are made and mature in the bone marrow while T-cells mature in thymus

Q9.Non-specific host defence that exists prior to the exposure to an antigen is called
  •  Acquired immunity
  •  Passive immunity
  •  Innate immunity
  •  Active immunity
Solution
Innate immunity is present from the birth and it is inherited from parents. It is non-specific

Q10. Sphygmomanometer measures
  •  Nerve conduction rate
  •  Heart beat rate
  •  Blood pressure
  • Pulse rate
Solution
Blood pressure is measured in mmHg by an instrument known as sphygmomanometer. The instrument was invented by an Italian Doctor Riva Racci.

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