Match the components of body defence with their corresponding descriptions.

External antibodies

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Internal antibodies

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Surface barriers

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Phagocytosis

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Solution

Active immunity develops in a body on being exposed to a live pathogen. Here, the pathogen establishes an infection, which is then subdued in time and the immunity is built due to the formation of memory cells. Passive immunity occurs when certain antibodies are passed from one individual to another. Our body has a two line defence system against pathogens. The first line of defence against pathgens are the surface barriers like the skin, and others like tears, saliva, etc. If the pathogens are able to get past the first line of defence, for example, through a cut in your skin, and an infection develops, the second line of defence becomes active. Through a sequence of steps called the immune response, the immune system attacks these pathogens. Phagocytosis is a part of second line of defense.

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Similar questions

Q. Column I lists the components of body defence and column II lists the corresponding descriptions. Match the two columns. Choose the correct option from those given.

Column I		Column II
A. Active natural immunity B. First line of defence C. Passive natural immunity D. Second line of defence		1. Injection of gamma globulins 2. Inflammation and phagocytosis 3. Direct contact with the pathogens that have entered inside 4. Surface barriers 5. Antibodies transferred through the placenta

Column I lists the components of body defence and column II lists the corresponding descriptions. Match the two columns. Choose the correct option from those given.
$\begin{matrix} Column I & Column II A. Active natural immunity & 1. Injection of gamma globulins B. First line of defence & 2. Inflammation and phagocytosis C. Passive natural immunity & 3. Direct contact with the pathogens that have entered inside D. Second line of defence & 4. Surface barriers 5. Antibodies transferred through the placenta \end{matrix}$

Q. Column I lists the components of body defense and column II lists the corresponding descriptions. Match the two columns.

Column I	Column II
A. Active natural immunity	p. Injection of gamma globulins
B. First line of defense	q. Complement proteins and interferons
C. Passive natural immunity	r. Direct contact with the pathogen that have entered inside
D. Second line of defense	s. Surface barriers
	t. Antibodies transferred through the placenta

Q. Column I lists the components of body defence and Column II lists the corresponding descriptions. Match the two columns. Choose the correct option from those given:

\begin{matrix} C o l u m n I & C o l u m n I I (a) & A c t i v e n a t u r a l & (p) & I n j e c t i o n o f g a m m a i m m u n i t y g l o b u l i n s (b) & F i r s t l i n e o f d e f e n c e & (q) & C o m p l e m e n t p r o t e i n s a n d i n t e r f e r o n s (c) & P a s s i v e n a t u r a l & (r) & D i r e c t c o n t a c t w i t h t h e i m m u n i t y p a t h o g e n s t h a t h a v e e n t e r e d i n s i d e (d) & S e c o n d l i n e o f d e f e n c e & (s) & S u r f a c e b a r r i e r s (t) & A n t i b o d i e s t r a n s f e r r e d t h r o u g h t h e p l a c e n t a \end{matrix}

Q. Match the electrical components with their corresponding symbols.

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