Protective Mechanical Barrier

Q.

The slimy secretion from the epithelial lining of various organs is called

1. Saliva

2. Sweat

3. Mucus

4. Pus

Q.

Eyelashes and eyelids can be considered as protective mechanical barriers.

1. True

2. False

Q.

Skin has an outer layer made of a protein Keratin.

1. True

2. False

Q.

In which all ways does pollutants enter our body?

1. Pollutants can enter directly through the skin

2. All of the above

3. Through mucous membranes

4. Through food, water or air.

Q.

The protective mechanical barriers which provide immunity include

1. Hair

2. Mucus

3. Skin

4. WBC