Immunity- Zanele Yaze Flashcards Preview

Grade 11-B Study Group > Immunity- Zanele Yaze > Flashcards

Flashcards in Immunity- Zanele Yaze Deck (10)
Loading flashcards...
1
Q

What is Immunity ?

A

The way in which an organism protects itself against pathogenic viruses

2
Q

What are the two main categories of Immunity ?

A

These Natural Immunity and Acquired Immunity

3
Q

What is Natural Immunity ?

A

It is the first line of defence against pathogens that infiltrates the body

4
Q

What type of Immunity do plants have ?

A

Plants only have Natural Immunity

5
Q

What type of Immunity do animals ( humans) have?

A

Humans have both Natural and Acquired Immunity

6
Q

What is the body’s first line of defence ?

A

The first line of defence against pathogens is the external barrier that prevents harmful substances from entering the body

7
Q

What are the examples of natural immune response that protect the body ?

A

The examples are coughing, sneezing reflex, action of tears and mucus

8
Q

What is the second line of defence?

A

The second line of defence in the body is inflammation and fever

9
Q

What is the purpose of white blood cells ( leucocytes) ?

A

Leucocytes recognise the pathogens as foreign cells as soon as they enter the bloodstream, due to the antigens on their cells surface.

10
Q

What are the two types of Leucocytes?

A

There are lymphocytes and phagocytes