Specific defence system (the immune system) Flashcards

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1
Q

Define specific defence system

A

It attacks particular (specific) pathogens

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2
Q

How does this system work? (2)

A

It works by:
the production of antibodies
white blood cells destroying body cells that have been infected with a particular pathogen

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3
Q

Where are monocytes and lymphocytes formed?

A

In the bone marrow

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4
Q

Once the monocytes and lymphocytes are formed, what happens to them?

A

They are moved from the bone marrow into blood vessels and into parts of the lymphatic system (lymph vessels and nodes, spleen and the thymus gland)

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5
Q

What do monochytes develop into?

A

macrophages

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6
Q

What do macrophages do?

A

They recognise foreign molecules (antigens) that are present on the surface of pathogens.

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7
Q

What happens when a macrophage digests a pathogen?

A

antigens from the pathogen are normally displayed on the surface of the macrophage

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8
Q

Define antigen

A

It is a foreign molecule that stimulates the production of antibodies

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9
Q

In what two ways do lymphocytes fight infection?

A
  1. Some attack body cells that display antigens on their surface.
  2. Others produce antibodies
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