Innate Immunity Barriers

Q. Barrier created by saliva and tears is related to

1. Physical barriers
2. Cellular barriers
3. Physiological barriers
4. Cytokine barriers

Q.

Which of the following is/are incorrect?

1. Skin is a tough outer layer, so it prevents entry of bacteria and viruses.

2. Skin secretes oil and sweat which are basic and kills most of the microbes.

3. Skin secretes lysozyme along with sweat which prevents infection.

4. Some bacteria in the stomach release acids which inhibit the growth of pathogens.

Q. Innate immunity is provided by ___.

1. Antibodies
2. Skin
3. B-cells
4. Mucus

Q. Innate immunity is provided by ___.

1. Antibodies
2. Neutrophils
3. T-cells
4. B-cells

Q. To which type of barries under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?

1. Physiological barriers
2. Physical barriers
3. Cytokine barriers
4. Cellular barriers

Q. Lysozyme is a special enzyme which helps kill microbes.

1. True
2. False

Q. Which one of the following acts as a physiological barrier to the entry of micro-organisms in the human body?

1. Tears
2. Skin
3. Lymphocyte
4. Monocyte

Q. A drop of perspiration was introduced into a nutrient medium. After incubation for 24 hours, the total bacterial count was checked and it was found to be negligible compared to the bacterial count in the tap water. This is due to the presence of:

1. Lipase
2. Lysozyme
3. Protease
4. Sodium chloride

Q. Which of the following statements regarding different barriers of innate immunity is not correct?

1. Mucus membrane lining the respiratory, gastrointestinal and urogenital tracts helps in trapping the microbes and constitute physiological barriers of our body
2. Certain types of leucocytes such as polymorpho-nuclear leucocytes (PMNL-neutrophils) and lymphocytes such as natural killer cells, constitute cellular barriers of our body
3. Virus infected cells secrete proteins called interferons which protect non-infected cells from further viral infection and constitute cytokine barriers of our body
4. Acid present in the stomach, saliva in the mouth, tears from the eyes prevent the growth of microorganisms and constitute physiological barriers of our body

Q. Which of the following statements regarding different barriers of innate immunity is not correct?

1. Acid present in the stomach, saliva in the mouth, tears from the eyes prevent the growth of micro-organisms and constitute physiological barriers of our body
2. Mucous membrane lining the respiratory, gastrointestinal and urinogenital tracts helps in trapping the microbes and constitute physiological barriers of our body
3. Virus infected cells secrete proteins called interferons which protect non-infected cells from further viral infection and constitute cytokine barriers of our body
4. Certain types of leucocytes such as polymorphonuclear leucocytes (PMNLneutrophils) and lymphocytes such as natural killer cells, constitute cellular barriers of our body