chemical and physical barriers - SB5 Flashcards
what is a lysozyme
a chemical that breaks down the cell walls of some types of bacteria
what is a physical barrier
something that physically prevents the pathogen entering the plant
what is a chemical barrier
a barrier that uses chemicals to defend the organism
what is mucus
a sticky substance that is produced by many linings in the body
what are ciliated cells
cells that are specialised to make substances across the body
what are STIs
a disease caused by pathogens being transmitted through sexual activity
list 3 physical barriers of the body
skin, nasal hair, blood clots, cilia, mucus etc
list 3 chemical barriers
neutrophil
lysozyme
HCL in stomach
mucus
gut bacteria
sweat
how can STIs be spread
contact with sexual fluids during unprotected sexual activity
getting sexual fluids in your eye
transmission from a pregnant woman to her unborn through placenta
contact with blood from infected person
breast milk from an infected mother
How can STIs be prevented
avoid contact with sexual fluids during sexual activity
bottle feeding the baby of an infected mother
not sharing needles for injecting drugs
