B.5 Flashcards
1
Q
What are pathogens
A
Microorganisms that cause disease
2
Q
What is a communicable disease
A
A disease that can be passed from person to person E.g.: Skin contact Inhaled Consumed
3
Q
What are the two types of pathogens
A
Bacteria and viruses
4
Q
Who is Ignaz Semmelweis
A
He saw that more woman died in childbirth when delivered by medical students than midwifes. He thought that the students were spreading bacteria from the dead bodies they were dissecting to the woman so he made them wash there hands - reducing the number of deaths
5
Q
Name 3 non specific body defence mechanisms
A
- Mucus in nose and throat traps bacteria
- Acid in stomach kills bacteria
- Skin acts as a natural barrier
6
Q
Name 3 defence mechanisms for plants
A
- Cell wall is made of cellulose which is hard for pathogens to penetrate
- Plants produce antibacterial chemicals that we use in medicine
- Deciduous trees lose there leaves in autumn so pathogens that infect them fall with them
