Chapter 5 - Health And Disease - Defence Mechanisms Flashcards
1
Q
What do tears contain, and what does it do?
A
Mucus - sticky, stops infections getting in
Salty (alkali) - kills pathogens
2
Q
What does earwax do?
A
Sticky - immobilises infections
Slightly acidic - denatures bacteria
3
Q
What does the stomach do?
A
Contains hydrochloric acid - defence against bacteria (denatures it)
4
Q
What do eyelashes do?
A
Stop dirt getting in your eyes
5
Q
What is in your nose, and what does it do?
A
Mucus - sticky - stops infections getting into lungs
6
Q
What does skin do?
A
It is a barrier against disease
Produces sebum, an oily substance which inhibits (stops) the growth of bacteria
7
Q
What does mucus contain, and what does it do?
A
Contains lysozymes, which destroy bacterial and fungal cell walls
