First Level Defense

Q.

What are physiological barriers?

Q.

Chylomicrons are:

1. Micelles covered by a protein coat

2. Droplets along with triglycerides

3. Triglycerides along with monosaccharides

4. Glycerol droplets formed in the intestine after digestion of fats

Q.

An enzyme called __________ is present in tears and saliva.

1. Hydrochloric acid

2. Basophil

3. Lysozyme

4. Lysosome

Q.

What is proteolytic enzyme ?

Q.

Which of the following component(s) contain lysozyme in it?

1. Tears

2. Saliva

3. Mucus

4. Sweat

Q. Using the available information, identify the defence mechanism that our skin provides.
A protein called keratin present here prevents the entry of germs. Sebum produced by this gland makes the skin oily and waterproof.

Q.

Identify the functions of the given types of defence.

$\begin{array}{cc}Firstleveldefence& \text{(I) \_\_\_\_\_\_\_\_\_\_\_\_}\\ Secondleveldefence& \text{(II) \_\_\_\_\_\_\_\_\_\_\_\_}\end{array}$

1. A - Destruction of Germs, B - Destruction of Germs

2. A - Destruction of Germs, B - Prevention from Germs

3. A - Prevention from Germs, B - Destruction of Germs

4. A - Prevention from Germs, B - Prevention from Germs

Q. Gayathri had learned about immune system in class. She wondered if any part of the immune system is visible to our eyes. When she asked a doctor, he told her that some components of the first barrier of defence are visible to our eye. Help her identify these components.

1. Skin
2. Mucus
3. Hydrochloric acid
4. Ear wax

Q. Match the following causes of diseases with their level of causes.

1. First level
2. Second level
3. Third level

Q.

Which of the following forms the first line of defence of the body against pathogens?

1. Skin

2. Tears

3. Mucus

4. All of these

Q. Macrophages are capable of attacking and destroying cancer cells.

1. False
2. True