Non-Specific Defences Flashcards Preview

Higher Human Biology - Immunology > Non-Specific Defences > Flashcards

Flashcards in Non-Specific Defences Deck (12)
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1
Q

Epithelial cells form a

A

physical barrier

2
Q

Epithelial cells can be found in

A

the skin and inner linings of the digestive and respiratory systems

3
Q

Chemical secretions are produced against

A

invading pathogens

4
Q

Examples of chemical secretions include

A

tears, mucus, saliva and stomach acid.

5
Q

In an inflammatory response, mast cells release

A

histamine

6
Q

Histamine causes

A

vasodilation and increased capillary permeability

7
Q

Increased blood flow in an inflammatory response leads to

A

a build up of phagocytes and clotting elements at the site of infection

8
Q

Phagocytes recognise pathogens and destroy them by

A

phagocytosis

9
Q

Phagocytosis involves the

A

engulfing of pathogens

10
Q

During phagocytosis, pathogens are destroyed by

A

digestive enzymes found in lysosomes.

11
Q

Phagocytes release cytokines which attract

A

more phagocytes to the site of infection

12
Q

Cytokines are protein molecules that cause

A

specific white blood cells to accumulate at the site of infection