Acid in stomach, saliva in the mouth, tears from eyes, all prevent microbial growth belong to which of the following barriers?

1. Physical barrier

2. Physiological barrier

3. Cellular barrier

4. Cytokine barrier

MALT constitutes about ______ percent of the lymphoid tissue in human body 

1. 50%

2. 20%

3. 70 %

4. 10%

A person who met with a road accident is likely to develop tetanus, can be immunised by administering

1. Weakened germs

2. Dead germs

3. Preformed antibodies

4. Wide spectrum antibiotics

A person suffering from a disease caused by Plasmodium, experiences chill and fever at the time when?

1. The sporozites released from RBCs are being rapidly killed and broken down inside spleen

2. The trophozites reach maximum growth and give out certain toxins

3. The parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs

4. The microgametocytes and megagametocytes are being destroyed by the WBCs

Which cells are the first to phagocytize foreign
particles in the tissues such as bacteria in a
wound?

1. fibroblasts

2. white blood cells

3. macrophages

4. mast cells

During an allergic reaction, the binding of
antigens to IgE antibodies initiates a response,
in which chemicals cause the dilation of blood
vessels and a host of other physiological
changes, Such chemicals are
1. interferons             2. hormones
3. histamines             4. acetylamine

Cirrhosis of liver is caused by the chronic intake of

1. opium

2. alcohol

3. tobacco

4. cocaine

Which one of the following is the correct statement regarding the particular psychotropic drug specified?
1. Hashish causes altered thought perceptions and hallucinations
2. Opium stimulates the nervous system and causes hallucinations
3. Morphine leads to delusions and disturbed emotions
4. Barbiturates cause relaxation and temporary euphoria

HIV that causes AIDS first starts destroying:

1. B-lymphocytes

2. leucocytes

3. thrombocytes

4. helper T-lymphocytes

The letter T, in T- lymphocyte refers to:

1. thyroid

2. thalamus

3. tonsil

4. thymus